diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4e6ccdb1..25c015d4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -120,7 +120,6 @@ if($ENV{CMAKE_PREFIX_PATH} MATCHES "6[.][0-9][.][0-9]")
             ${Qt6UiTools_INCLUDES}
             ${CMAKE_CURRENT_BINARY_DIR}
             )
-        add_subdirectory(backend_qt)
         add_subdirectory(frontend_qt)
     else()
         message(STATUS "Could NOT find Qt6")
@@ -142,7 +141,6 @@ else()
             ${Qt5UiTools_INCLUDES}
             ${CMAKE_CURRENT_BINARY_DIR}
             )
-        add_subdirectory(backend_qt)
         add_subdirectory(frontend_qt)
     else()
         message(STATUS "Could NOT find Qt5")
diff --git a/backend_qt/CMakeLists.txt b/backend_qt/CMakeLists.txt
deleted file mode 100644
index 03d9566f..00000000
--- a/backend_qt/CMakeLists.txt
+++ /dev/null
@@ -1,32 +0,0 @@
-# (c) 2008 by BogDan Vatra < bogdan@licentia.eu >
-# vim: set ts=4 sw=4 et :
-
-project(QZint)
-
-include_directories(BEFORE "${CMAKE_SOURCE_DIR}/backend" )
-
-set(QZint_SRCS qzint.cpp)
-
-if(USE_QT6)
-    qt6_wrap_cpp(QZint_SRCS qzint.h)
-else()
-    qt5_wrap_cpp(QZint_SRCS qzint.h)
-endif()
-
-add_library(QZint SHARED ${QZint_SRCS})
-
-set_target_properties(QZint PROPERTIES  SOVERSION "${ZINT_VERSION_MAJOR}.${ZINT_VERSION_MINOR}"
-                                        VERSION ${ZINT_VERSION})
-
-add_dependencies(QZint zint)
-
-link_directories( "${CMAKE_BINARY_DIR}/backend" )
-
-if(USE_QT6)
-    target_link_libraries(QZint zint Qt6::Widgets Qt6::Gui)
-else()
-    target_link_libraries(QZint zint Qt5::Widgets Qt5::Gui)
-endif()
-
-install(TARGETS QZint  ${INSTALL_TARGETS_DEFAULT_ARGS} )
-install(FILES qzint.h DESTINATION ${INCLUDE_INSTALL_DIR} COMPONENT Devel)
diff --git a/backend_qt/backend_qt.pro b/backend_qt/backend_qt.pro
deleted file mode 100644
index 3abf60bf..00000000
--- a/backend_qt/backend_qt.pro
+++ /dev/null
@@ -1,144 +0,0 @@
-
-TEMPLATE = lib
-
-
-# My qt is configured for static build:
-# http://qt-project.org/wiki/Build_Standalone_Qt_Application_for_Windows
-CONFIG += staticlib
-
-# for dynamic build enable this:
-#CONFIG += dll
-
-macx{
-	CONFIG -= dll
-	CONFIG += lib_bundle
-}
-
-TARGET = QtZint
-
-INCLUDEPATH += ../backend
-
-#EDIT THIS !!!!
-DEFINES += ZINT_VERSION="\\\"2.9.1.9\\\""
-
-!contains(DEFINES, NO_PNG) {
-    INCLUDEPATH += ../../lpng
-    INCLUDEPATH += ../../zlib
-}
-
-contains(DEFINES, QR_SYSTEM){
-    LIBS += -lqrencode
-}
-
-contains(DEFINES, QR){
-
-INCLUDEPATH += qrencode
-
-HEADERS += qrencode/bitstream.h \
-           qrencode/mask.h \
-           qrencode/qrencode.h \
-           qrencode/qrencode_inner.h \
-           qrencode/qrinput.h \
-           qrencode/qrspec.h \
-           qrencode/rscode.h \
-           qrencode/split.h 
-
-SOURCES += qrencode/bitstream.c \
-           qrencode/mask.c \
-           qrencode/qrencode.c \
-           qrencode/qrinput.c \
-           qrencode/qrspec.c \
-           qrencode/rscode.c \
-           qrencode/split.c 
-}
-
-HEADERS +=  ../backend/aztec.h \
-            ../backend/bmp.h \
-            ../backend/channel_precalcs.h \
-            ../backend/code128.h \
-            ../backend/code49.h \
-            ../backend/common.h \
-            ../backend/composite.h \
-            ../backend/dmatrix.h \
-            ../backend/eci.h \
-            ../backend/font.h \
-            ../backend/gb18030.h \
-            ../backend/gb2312.h \
-            ../backend/gridmtx.h \
-            ../backend/gs1.h \
-            ../backend/hanxin.h \
-            ../backend/large.h \
-            ../backend/maxicode.h \
-            ../backend/output.h \
-            ../backend/pcx.h \
-            ../backend/pdf417.h \
-            ../backend/reedsol.h \
-            ../backend/rss.h \
-            ../backend/sjis.h \
-            ../backend/stdint_msvc.h \
-            ../backend/zint.h \
-            qzint.h
-
-SOURCES += ../backend/2of5.c \
-           ../backend/auspost.c \
-           ../backend/aztec.c \
-           ../backend/bmp.c \
-           ../backend/codablock.c \
-           ../backend/code.c \
-           ../backend/code128.c \
-           ../backend/code16k.c \
-           ../backend/code49.c \
-           ../backend/common.c \
-           ../backend/composite.c \
-           ../backend/dmatrix.c \
-           ../backend/dotcode.c \
-           ../backend/eci.c \
-           ../backend/emf.c \
-           ../backend/gb18030.c \
-           ../backend/gb2312.c \
-           ../backend/general_field.c \
-           ../backend/gif.c \
-           ../backend/gridmtx.c \
-           ../backend/gs1.c \
-           ../backend/hanxin.c \
-           ../backend/imail.c \
-           ../backend/large.c \
-           ../backend/library.c \
-           ../backend/mailmark.c \
-           ../backend/maxicode.c \
-           ../backend/medical.c \
-           ../backend/output.c \
-           ../backend/pcx.c \
-           ../backend/pdf417.c \
-           ../backend/plessey.c \
-           ../backend/postal.c \
-           ../backend/ps.c \
-           ../backend/raster.c \
-           ../backend/reedsol.c \
-           ../backend/rss.c \
-           ../backend/sjis.c \
-           ../backend/svg.c \
-           ../backend/telepen.c \
-           ../backend/tif.c \
-           ../backend/ultra.c \
-           ../backend/upcean.c \
-           ../backend/vector.c \
-           ../backend/qr.c \
-           ../backend/dllversion.c \
-           ../backend/code1.c \
-           ../backend/png.c \
-           qzint.cpp
-
-VERSION = 2.9.1.9
-
-#DESTDIR = .
-
-#include.path = $$[ZINT_INSTALL_HEADERS]
-include.path = inst/include
-include.files = ../backend/zint.h qzint.h
-
-#target.path = $$[ZINT_INSTALL_LIBS]
-target.path = inst/lib
-
-INSTALLS += target include
-
diff --git a/backend_qt/backend_qt_zintdll.pro b/backend_qt/backend_qt_zintdll.pro
deleted file mode 100644
index 8f506df4..00000000
--- a/backend_qt/backend_qt_zintdll.pro
+++ /dev/null
@@ -1,13 +0,0 @@
-TEMPLATE = lib
-
-CONFIG += staticlib
-
-TARGET = QtZintDLL
-
-INCLUDEPATH += ../backend
-
-LIBS += -L"../win32/Release" -lzint
-
-HEADERS += qzint.h
-
-SOURCES += qzint.cpp
diff --git a/backend_qt/backend_vc8.pro b/backend_qt/backend_vc8.pro
deleted file mode 100644
index 360ca518..00000000
--- a/backend_qt/backend_vc8.pro
+++ /dev/null
@@ -1,97 +0,0 @@
-win32 {
-	TEMPLATE = vclib
-	CONFIG += staticlib debug-and-release
-}
-
-TARGET = QtZint2
-VERSION = 2.9.1.9
-
-QMAKE_CFLAGS += /TP /wd4018 /wd4244 /wd4305
-QMAKE_CXXFLAGS += /TP /wd4018 /wd4244 /wd4305
-
-INCLUDEPATH += ../backend d:\\opt\\include
-
-DEFINES +=  _CRT_SECURE_NO_WARNINGS _CRT_NONSTDC_NO_WARNINGS ZINT_VERSION=\\\"$$VERSION\\\" include=""
-
-!contains(DEFINES, NO_PNG) {
-    SOURCES += ../backend/png.c
-}
-
-HEADERS +=  ../backend/aztec.h \
-            ../backend/bmp.h \
-            ../backend/channel_precalcs.h \
-            ../backend/code1.h \
-            ../backend/code128.h \
-            ../backend/code49.h \
-            ../backend/common.h \
-            ../backend/composite.h \
-            ../backend/dmatrix.h \
-            ../backend/eci.h \
-            ../backend/emf.h \
-            ../backend/font.h \
-            ../backend/gb18030.h \
-            ../backend/gb2312.h \
-            ../backend/general_field.h \
-            ../backend/gridmtx.h \
-            ../backend/gs1.h \
-            ../backend/hanxin.h \
-            ../backend/large.h \
-            ../backend/maxicode.h \
-            ../backend/ms_stdint.h \
-            ../backend/output.h \
-            ../backend/pcx.h \
-            ../backend/pdf417.h \
-            ../backend/qr.h \
-            ../backend/reedsol.h \
-            ../backend/rss.h \
-            ../backend/sjis.h \
-            ../backend/tif.h \
-            ../backend/zint.h \
-            qzint.h
-
-SOURCES += ../backend/2of5.c \
-           ../backend/auspost.c \
-           ../backend/aztec.c \
-           ../backend/bmp.c \
-           ../backend/codablock.c \
-           ../backend/code.c \
-           ../backend/code1.c \
-           ../backend/code128.c \
-           ../backend/code16k.c \
-           ../backend/code49.c \
-           ../backend/common.c \
-           ../backend/composite.c \
-           ../backend/dmatrix.c \
-           ../backend/dotcode.c \
-           ../backend/eci.c \
-           ../backend/emf.c \
-           ../backend/gb18030.c \
-           ../backend/gb2312.c \
-           ../backend/gridmtx.c \
-           ../backend/general_field.c \
-           ../backend/gif.c \
-           ../backend/gs1.c \
-           ../backend/hanxin.c \
-           ../backend/imail.c \
-           ../backend/large.c \
-           ../backend/library.c \
-           ../backend/mailmark.c \
-           ../backend/maxicode.c \
-           ../backend/medical.c \
-           ../backend/output.c \
-           ../backend/pcx.c \
-           ../backend/pdf417.c \
-           ../backend/plessey.c \
-           ../backend/postal.c \
-           ../backend/ps.c \
-           ../backend/qr.c \
-           ../backend/raster.c \
-           ../backend/reedsol.c \
-           ../backend/rss.c \
-           ../backend/svg.c \
-           ../backend/telepen.c \
-           ../backend/tif.c \
-           ../backend/ultra.c \
-           ../backend/upcean.c \
-           ../backend/vector.c \
-           qzint.cpp
diff --git a/backend_qt/readme b/backend_qt/readme
deleted file mode 100644
index 2ec3a7db..00000000
--- a/backend_qt/readme
+++ /dev/null
@@ -1,9 +0,0 @@
-Edit zint-1.6.pro and edit the 'DEFINES'  section
-    NO_PNG -> compile zint without png support
-    NO_QR -> compile zint without QR support
-    QR_SYSTEM -> if you have QT installed in your system, zint will be compiled with QT support
-    QR -> compile zint with QR support static (you must have qrencode in the current folder)
-
-Edit compile_n_config and set the paths.
-
-Exec compile_n_config
diff --git a/frontend_qt/CMakeLists.txt b/frontend_qt/CMakeLists.txt
index 0b8781f4..2b5ae9d5 100644
--- a/frontend_qt/CMakeLists.txt
+++ b/frontend_qt/CMakeLists.txt
@@ -3,16 +3,16 @@
 
 project(zint-qt)
 
-include_directories(BEFORE "${CMAKE_SOURCE_DIR}/backend"  "${CMAKE_SOURCE_DIR}/backend_qt")
+include_directories(BEFORE "${CMAKE_SOURCE_DIR}/backend")
 
-set(zint-qt_SRCS barcodeitem.cpp  main.cpp  mainwindow.cpp datawindow.cpp sequencewindow.cpp exportwindow.cpp)
+set(zint-qt_SRCS barcodeitem.cpp  main.cpp  mainwindow.cpp datawindow.cpp sequencewindow.cpp exportwindow.cpp qzint.cpp)
 
 if(USE_QT6)
-    qt6_wrap_cpp(zint-qt_SRCS mainwindow.h datawindow.h sequencewindow.h exportwindow.h)
+    qt6_wrap_cpp(zint-qt_SRCS mainwindow.h datawindow.h sequencewindow.h exportwindow.h qzint.h)
     qt6_wrap_ui(zint-qt_SRCS mainWindow.ui extData.ui extSequence.ui extExport.ui)
     qt6_add_resources(zint-qt_SRCS resources.qrc)
 else()
-    qt5_wrap_cpp(zint-qt_SRCS mainwindow.h datawindow.h sequencewindow.h exportwindow.h)
+    qt5_wrap_cpp(zint-qt_SRCS mainwindow.h datawindow.h sequencewindow.h exportwindow.h qzint.h)
     qt5_wrap_ui(zint-qt_SRCS mainWindow.ui extData.ui extSequence.ui extExport.ui)
     qt5_add_resources(zint-qt_SRCS resources.qrc)
 endif()
@@ -23,9 +23,9 @@ endif()
 #               grpC39.ui    grpCodeOne.ui     grpHX.ui        grpMSICheck.ui  grpUPCA.ui
 
 add_executable(zint-qt ${zint-qt_SRCS})
-add_dependencies(zint-qt QZint zint)
+add_dependencies(zint-qt zint)
 
-link_directories( "${CMAKE_BINARY_DIR}/backend" "${CMAKE_BINARY_DIR}/backend_qt" )
+link_directories( "${CMAKE_BINARY_DIR}/backend" )
 
 if(USE_QT6)
     target_link_libraries(zint-qt zint QZint Qt6::UiTools ${QT_QTXML_LIBRARY} Qt6::Gui Qt6::Core)
diff --git a/frontend_qt/barcodeitem.h b/frontend_qt/barcodeitem.h
index 13b5e78b..0e1ce907 100644
--- a/frontend_qt/barcodeitem.h
+++ b/frontend_qt/barcodeitem.h
@@ -18,7 +18,7 @@
 #define BARCODEITEM_H
 
 #include <QGraphicsItem>
-#include <qzint.h>
+#include "qzint.h"
 
 /**
  @author BogDan Vatra <taipan@licentia.eu>
diff --git a/frontend_qt/frontend_qt.pro b/frontend_qt/frontend_qt.pro
index 9b58dbb3..c1ec8a28 100644
--- a/frontend_qt/frontend_qt.pro
+++ b/frontend_qt/frontend_qt.pro
@@ -12,7 +12,8 @@ HEADERS += barcodeitem.h \
          datawindow.h \
          exportwindow.h \
          mainwindow.h \
-         sequencewindow.h
+         sequencewindow.h \
+         qzint.h
 
 FORMS += extData.ui \
          extExport.ui \
@@ -50,7 +51,8 @@ SOURCES += barcodeitem.cpp \
         exportwindow.cpp \
         main.cpp \
         mainwindow.cpp \
-        sequencewindow.cpp
+        sequencewindow.cpp \
+        qzint.cpp
         
 TRANSLATIONS = frontend_de.ts
 
@@ -63,10 +65,9 @@ CONFIG += static
 
 CONFIG += warn_on thread qt
 
-INCLUDEPATH += ../backend_qt ../backend
+INCLUDEPATH += ../backend
 
-LIBS += -lQtZint -lQt5Core
-QMAKE_LIBDIR += ../backend_qt/release
+LIBS += -lQt5Core
 
 !contains(DEFINES, NO_PNG) {
 # Win
diff --git a/frontend_qt/frontend_qt_zintdll.pro b/frontend_qt/frontend_qt_zintdll.pro
index a39e6ecd..3e3e5442 100644
--- a/frontend_qt/frontend_qt_zintdll.pro
+++ b/frontend_qt/frontend_qt_zintdll.pro
@@ -1,59 +1,60 @@
-TEMPLATE = app
-TARGET = qtZint
-QT += uitools
-QT += widgets
-
-# Input
-HEADERS += barcodeitem.h \
-         datawindow.h \
-         exportwindow.h \
-         mainwindow.h \
-         sequencewindow.h
-
-FORMS += extData.ui \
-         extExport.ui \
-         extSequence.ui \
-         grpAztec.ui \
-         grpC11.ui \
-         grpC128.ui \
-         grpC16k.ui \
-         grpC39.ui \
-         grpC49.ui \
-         grpChannel.ui \
-         grpCodabar.ui \
-         grpCodablockF.ui \
-         grpCodeOne.ui \
-         grpDBExtend.ui \
-         grpDM.ui \
-         grpDotCode.ui \
-         grpGrid.ui \
-         grpHX.ui \
-         grpLOGMARS.ui \
-         grpMaxicode.ui \
-         grpMicroPDF.ui \
-         grpMQR.ui \
-         grpMSICheck.ui \
-         grpPDF417.ui \
-         grpQR.ui \
-         grpRMQR.ui \
-         grpUPCA.ui \
-         grpUPCEAN.ui \
-         grpVIN.ui \
-         mainWindow.ui
-
-SOURCES += barcodeitem.cpp \
-        datawindow.cpp \
-        exportwindow.cpp \
-        main.cpp \
-        mainwindow.cpp \
-        sequencewindow.cpp
-        
-RESOURCES += resources.qrc
-
-RC_FILE += res/qtZint.rc
-
-INCLUDEPATH += ../backend_qt ../backend
-
-LIBS += -lQtZintDLL -lzint
-QMAKE_LIBDIR += ../backend_qt/release
-QMAKE_LIBDIR += ../win32/Release
+TEMPLATE = app
+TARGET = qtZint
+QT += uitools
+QT += widgets
+
+# Input
+HEADERS += barcodeitem.h \
+         datawindow.h \
+         exportwindow.h \
+         mainwindow.h \
+         sequencewindow.h \
+         qzint.h
+
+FORMS += extData.ui \
+         extExport.ui \
+         extSequence.ui \
+         grpAztec.ui \
+         grpC11.ui \
+         grpC128.ui \
+         grpC16k.ui \
+         grpC39.ui \
+         grpC49.ui \
+         grpChannel.ui \
+         grpCodabar.ui \
+         grpCodablockF.ui \
+         grpCodeOne.ui \
+         grpDBExtend.ui \
+         grpDM.ui \
+         grpDotCode.ui \
+         grpGrid.ui \
+         grpHX.ui \
+         grpLOGMARS.ui \
+         grpMaxicode.ui \
+         grpMicroPDF.ui \
+         grpMQR.ui \
+         grpMSICheck.ui \
+         grpPDF417.ui \
+         grpQR.ui \
+         grpRMQR.ui \
+         grpUPCA.ui \
+         grpUPCEAN.ui \
+         grpVIN.ui \
+         mainWindow.ui
+
+SOURCES += barcodeitem.cpp \
+        datawindow.cpp \
+        exportwindow.cpp \
+        main.cpp \
+        mainwindow.cpp \
+        sequencewindow.cpp \
+        qzint.cpp
+        
+RESOURCES += resources.qrc
+
+RC_FILE += res/qtZint.rc
+
+INCLUDEPATH += ../backend
+
+LIBS += -lzint
+QMAKE_LIBDIR += ../win32/Release
diff --git a/frontend_qt/frontend_vc8.pro b/frontend_qt/frontend_vc8.pro
index 77d8c447..8eeab07a 100644
--- a/frontend_qt/frontend_vc8.pro
+++ b/frontend_qt/frontend_vc8.pro
@@ -14,7 +14,8 @@ HEADERS = 	mainwindow.h \
 			barcodeitem.h \
 			datawindow.h \
 			exportwindow.h \
-			sequencewindow.h
+			sequencewindow.h \
+			qzint.h
 
 SOURCES = 	main.cpp \ 
 			mainwindow.cpp \
@@ -22,18 +23,11 @@ SOURCES = 	main.cpp \
 			datawindow.cpp \
 			exportwindow.cpp \
 			sequencewindow.cpp
+			qzint.cpp
 
 RESOURCES = resources.qrc
 
-INCLUDEPATH += ../backend_qt4 ../backend
-
-CONFIG(debug, debug|release) {
-LIBPATH +=	../backend_qt4/debug
-}
-
-CONFIG(release, debug|release) {
-LIBPATH +=	../backend_qt4/release
-}
+INCLUDEPATH += ../backend
 
 RC_FILE = ./res/qtZint.rc
          
diff --git a/backend_qt/qzint.cpp b/frontend_qt/qzint.cpp
similarity index 100%
rename from backend_qt/qzint.cpp
rename to frontend_qt/qzint.cpp
diff --git a/backend_qt/qzint.h b/frontend_qt/qzint.h
similarity index 100%
rename from backend_qt/qzint.h
rename to frontend_qt/qzint.h