diff --git a/backend_qt4/QtZint2.sln b/backend_qt4/QtZint2.sln
deleted file mode 100644
index 8a7c50cb..00000000
--- a/backend_qt4/QtZint2.sln
+++ /dev/null
@@ -1,20 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 10.00
-# Visual Studio 2008
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "QtZint2", "QtZint2.vcproj", "{54ADAB01-7047-3ED1-B8D2-7AC84B1C5090}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Win32 = Debug|Win32
-		Release|Win32 = Release|Win32
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{54ADAB01-7047-3ED1-B8D2-7AC84B1C5090}.Debug|Win32.ActiveCfg = Debug|Win32
-		{54ADAB01-7047-3ED1-B8D2-7AC84B1C5090}.Debug|Win32.Build.0 = Debug|Win32
-		{54ADAB01-7047-3ED1-B8D2-7AC84B1C5090}.Release|Win32.ActiveCfg = Release|Win32
-		{54ADAB01-7047-3ED1-B8D2-7AC84B1C5090}.Release|Win32.Build.0 = Release|Win32
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal
diff --git a/backend_qt4/QtZint2.vcproj b/backend_qt4/QtZint2.vcproj
deleted file mode 100644
index ecc26286..00000000
--- a/backend_qt4/QtZint2.vcproj
+++ /dev/null
@@ -1,411 +0,0 @@
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-<VisualStudioProject
-	ProjectType="Visual C++"
-	Version="9,00"
-	Name="QtZint2"
-	ProjectGUID="{54ADAB01-7047-3ED1-B8D2-7AC84B1C5090}"
-	Keyword="Qt4VSv1.0"
-	TargetFrameworkVersion="0"
-	>
-	<Platforms>
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-			Name="Win32"
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-			Name="Debug|Win32"
-			OutputDirectory="."
-			IntermediateDirectory="debug\"
-			ConfigurationType="4"
-			UseOfMFC="0"
-			ATLMinimizesCRunTimeLibraryUsage="false"
-			>
-			<Tool
-				Name="VCPreBuildEventTool"
-			/>
-			<Tool
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-				DefaultCharType="0"
-				EnableErrorChecks="1"
-			/>
-			<Tool
-				Name="VCCLCompilerTool"
-				AdditionalOptions="-Zm200 -w34100 -w34189 -w34100 -w34189"
-				Optimization="4"
-				AdditionalIncludeDirectories="&quot;d:\Prog\Qt\4.6.0-beta1\include\QtCore&quot;,&quot;d:\Prog\Qt\4.6.0-beta1\include\QtGui&quot;,&quot;d:\Prog\Qt\4.6.0-beta1\include&quot;,&quot;..\backend&quot;,&quot;d:\opt\include&quot;,&quot;d:\Prog\Qt\4.6.0-beta1\include\ActiveQt&quot;,&quot;debug&quot;,d:\Prog\Qt\4.6.0-beta1\mkspecs\default"
-				PreprocessorDefinitions="UNICODE;WIN32;QT_LARGEFILE_SUPPORT;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION=\&quot;2.3.0\&quot;;QT_GUI_LIB;QT_CORE_LIB;QT_THREAD_SUPPORT"
-				GeneratePreprocessedFile="0"
-				ExceptionHandling="1"
-				RuntimeLibrary="3"
-				BufferSecurityCheck="false"
-				TreatWChar_tAsBuiltInType="false"
-				RuntimeTypeInfo="true"
-				AssemblerListingLocation="debug\"
-				ObjectFile="debug\"
-				ProgramDataBaseFileName=".\"
-				WarningLevel="3"
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-			<Tool
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-			<Tool
-				Name="VCResourceCompilerTool"
-				PreprocessorDefinitions="UNICODE,WIN32,QT_LARGEFILE_SUPPORT,_CRT_SECURE_NO_WARNINGS,_CRT_NONSTDC_NO_WARNINGS,ZINT_VERSION=\&quot;2.3.0\&quot;,QT_GUI_LIB,QT_CORE_LIB,QT_THREAD_SUPPORT,_DEBUG"
-				ResourceOutputFileName="debug\/$(InputName).res"
-			/>
-			<Tool
-				Name="VCPreLinkEventTool"
-			/>
-			<Tool
-				Name="VCLibrarianTool"
-				OutputFile="debug\QtZint2.lib"
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-			<Tool
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-		</Configuration>
-		<Configuration
-			Name="Release|Win32"
-			OutputDirectory="."
-			IntermediateDirectory="release\"
-			ConfigurationType="4"
-			UseOfMFC="0"
-			ATLMinimizesCRunTimeLibraryUsage="false"
-			>
-			<Tool
-				Name="VCPreBuildEventTool"
-			/>
-			<Tool
-				Name="VCCustomBuildTool"
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-			/>
-			<Tool
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-			/>
-			<Tool
-				Name="VCMIDLTool"
-				WarningLevel="0"
-				DefaultCharType="0"
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-			<Tool
-				Name="VCCLCompilerTool"
-				AdditionalOptions="-Zm200 -w34100 -w34189 -w34100 -w34189"
-				Optimization="2"
-				AdditionalIncludeDirectories="&quot;d:\Prog\Qt\4.6.0-beta1\include\QtCore&quot;,&quot;d:\Prog\Qt\4.6.0-beta1\include\QtGui&quot;,&quot;d:\Prog\Qt\4.6.0-beta1\include&quot;,&quot;..\backend&quot;,&quot;d:\opt\include&quot;,&quot;d:\Prog\Qt\4.6.0-beta1\include\ActiveQt&quot;,&quot;release&quot;,d:\Prog\Qt\4.6.0-beta1\mkspecs\default"
-				PreprocessorDefinitions="QT_NO_DEBUG,NDEBUG,UNICODE,WIN32,QT_LARGEFILE_SUPPORT,_CRT_SECURE_NO_WARNINGS,_CRT_NONSTDC_NO_WARNINGS,ZINT_VERSION=\&quot;2.3.0\&quot;,QT_NO_DEBUG,QT_GUI_LIB,QT_CORE_LIB,QT_THREAD_SUPPORT,NDEBUG"
-				GeneratePreprocessedFile="0"
-				ExceptionHandling="1"
-				RuntimeLibrary="2"
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-				RuntimeTypeInfo="true"
-				AssemblerListingLocation="release\"
-				ObjectFile="release\"
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-				WarningLevel="3"
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-				CompileAs="2"
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-			<Tool
-				Name="VCManagedResourceCompilerTool"
-			/>
-			<Tool
-				Name="VCResourceCompilerTool"
-				PreprocessorDefinitions="QT_NO_DEBUG,NDEBUG,UNICODE,WIN32,QT_LARGEFILE_SUPPORT,_CRT_SECURE_NO_WARNINGS,_CRT_NONSTDC_NO_WARNINGS,ZINT_VERSION=\&quot;2.3.0\&quot;,QT_NO_DEBUG,QT_GUI_LIB,QT_CORE_LIB,QT_THREAD_SUPPORT"
-				ResourceOutputFileName="release\/$(InputName).res"
-			/>
-			<Tool
-				Name="VCPreLinkEventTool"
-			/>
-			<Tool
-				Name="VCLibrarianTool"
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-			/>
-			<Tool
-				Name="VCALinkTool"
-			/>
-			<Tool
-				Name="VCXDCMakeTool"
-			/>
-			<Tool
-				Name="VCBscMakeTool"
-			/>
-			<Tool
-				Name="VCFxCopTool"
-			/>
-			<Tool
-				Name="VCPostBuildEventTool"
-			/>
-		</Configuration>
-	</Configurations>
-	<References>
-	</References>
-	<Files>
-		<Filter
-			Name="Source Files"
-			Filter="cpp;c;cxx;def;odl;idl;hpj;bat;asm;asmx"
-			UniqueIdentifier="{4FC737F1-C7A5-4376-A066-2A32D752A2FF}"
-			>
-			<File
-				RelativePath="..\backend\2of5.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\auspost.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\aztec.c"
-				>
-			</File>
-			<File
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-			</File>
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-				>
-			</File>
-			<File
-				RelativePath="..\backend\code1.c"
-				>
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-			<File
-				RelativePath="..\backend\code128.c"
-				>
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-			<File
-				RelativePath="..\backend\code16k.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\code49.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\common.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\composite.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\dm200.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\dmatrix.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\gridmtx.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\gs1.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\imail.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\large.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\library.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\maxicode.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\medical.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\pdf417.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\plessey.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\png.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\postal.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\ps.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\qr.c"
-				>
-			</File>
-			<File
-				RelativePath="qzint.cpp"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\reedsol.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\rss.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\svg.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\telepen.c"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\upcean.c"
-				>
-			</File>
-		</Filter>
-		<Filter
-			Name="Header Files"
-			Filter="h;hpp;hxx;hm;inl;inc;xsd"
-			UniqueIdentifier="{93995380-89BD-4b04-88EB-625FBE52EBFB}"
-			>
-			<File
-				RelativePath="..\backend\aztec.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\code1.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\code49.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\common.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\composite.h"
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-				RelativePath="..\backend\dm200.h"
-				>
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-				RelativePath="..\backend\gs1.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\large.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\maxicode.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\maxipng.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\ms_stdint.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\pdf417.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\qr.h"
-				>
-			</File>
-			<File
-				RelativePath="qzint.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\reedsol.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\rss.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\sjis.h"
-				>
-			</File>
-			<File
-				RelativePath="..\backend\zint.h"
-				>
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-	<Globals>
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-</VisualStudioProject>
diff --git a/backend_qt4/backend_qt4.pro b/backend_qt4/backend_qt4.pro
deleted file mode 100644
index 6fbfd44a..00000000
--- a/backend_qt4/backend_qt4.pro
+++ /dev/null
@@ -1,110 +0,0 @@
-TEMPLATE = lib
-
-CONFIG += dll
-
-macx{
-	CONFIG -= dll
-	CONFIG += lib_bundle
-}
-
-TARGET = QtZint
-
-INCLUDEPATH += ../backend
-
-#EDIT THIS !!!!
-DEFINES += NO_PNG NO_QR ZINT_VERSION="2.3.0"
-
-!contains(DEFINES, NO_PNG) {
-    SOURCES += ../backend/png.c
-    LIBS += -lpng
-}
-
-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/code49.h \
-            ../backend/common.h \
-            ../backend/composite.h \
-            ../backend/dm200.h \
-            ../backend/dmatrix.h \
-            ../backend/font.h \
-            ../backend/gs1.h \
-            ../backend/large.h \
-            ../backend/maxicode.h \
-            ../backend/maxipng.h \
-            ../backend/micqr.h \
-            ../backend/pdf417.h \
-            ../backend/reedsol.h \
-            ../backend/rss.h \
-            ../backend/sjis.h \
-            ../backend/zint.h \
-            qzint.h
-
-SOURCES += ../backend/2of5.c \
-           ../backend/auspost.c \
-           ../backend/aztec.c \
-           ../backend/blockf.c \
-           ../backend/code.c \
-           ../backend/code128.c \
-           ../backend/code16k.c \
-           ../backend/code49.c \
-           ../backend/common.c \
-           ../backend/composite.c \
-           ../backend/dm200.c \
-           ../backend/dmatrix.c \
-           ../backend/gs1.c \
-           ../backend/imail.c \
-           ../backend/large.c \
-           ../backend/library.c \
-           ../backend/maxicode.c \
-           ../backend/medical.c \
-           ../backend/micqr.c \
-           ../backend/pdf417.c \
-           ../backend/plessey.c \
-           ../backend/postal.c \
-           ../backend/ps.c \
-           ../backend/reedsol.c \
-           ../backend/rss.c \
-           ../backend/svg.c \
-           ../backend/telepen.c \
-           ../backend/upcean.c \
-           ../backend/qr.c \
-           ../backend/dllversion.c \
-           ../backend/code1.c \
-           qzint.cpp
-
-VERSION = 2.3.0
-
-#DESTDIR = .
-
-include.path = $$[ZINT_INSTALL_HEADERS]
-include.files = ../backend/zint.h qzint.h
-
-target.path = $$[ZINT_INSTALL_LIBS]
-
-INSTALLS += target include
-