diff --git a/.appveyor.yml b/.appveyor.yml
index f7c5710e7aa36..1fba476be58df 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -9,7 +9,7 @@ image: Visual Studio 2019
 branches:
   only:
   - master
-  - 3.5alpha
+  - 3.5alpha2
 
 # build cache to preserve files/folders between builds
 cache:
diff --git a/build/Packaging.cmake b/build/Packaging.cmake
index 7e833441d8f65..1ee9c21551b1d 100644
--- a/build/Packaging.cmake
+++ b/build/Packaging.cmake
@@ -50,21 +50,21 @@ IF(MINGW OR MSVC)
     SET(CPACK_STRIP_FILES "${MSCORE_EXECUTABLE_NAME}.exe")
 
     # File types association:
-    SET(CPACK_NSIS_DEFINES "!include ${PROJECT_SOURCE_DIR}/build/packaging\\\\FileAssociation.nsh")
+    # SET(CPACK_NSIS_DEFINES "!include ${PROJECT_SOURCE_DIR}/build/packaging\\\\FileAssociation.nsh")
 
-    SET(CPACK_NSIS_EXTRA_INSTALL_COMMANDS "
-        \\\${registerExtension} \\\"MuseScore File\\\" \\\".mscx\\\" \\\"\\\$INSTDIR\\\\bin\\\\${MSCORE_EXECUTABLE_NAME}.exe\\\"
-        \\\${registerExtension} \\\"Compressed MuseScore File\\\" \\\".mscz\\\" \\\"\\\$INSTDIR\\\\bin\\\\${MSCORE_EXECUTABLE_NAME}.exe\\\"
-    ")
-    SET(CPACK_NSIS_EXTRA_UNINSTALL_COMMANDS "
-        \\\${unregisterExtension} \\\".mscx\\\" \\\"MuseScore File\\\"
-        \\\${unregisterExtension} \\\".mscz\\\" \\\"Compressed MuseScore File\\\"
-    ")
+    # SET(CPACK_NSIS_EXTRA_INSTALL_COMMANDS "
+    #     \\\${registerExtension} \\\"MuseScore File\\\" \\\".mscx\\\" \\\"\\\$INSTDIR\\\\bin\\\\${MSCORE_EXECUTABLE_NAME}.exe\\\"
+    #     \\\${registerExtension} \\\"Compressed MuseScore File\\\" \\\".mscz\\\" \\\"\\\$INSTDIR\\\\bin\\\\${MSCORE_EXECUTABLE_NAME}.exe\\\"
+    # ")
+    # SET(CPACK_NSIS_EXTRA_UNINSTALL_COMMANDS "
+    #     \\\${unregisterExtension} \\\".mscx\\\" \\\"MuseScore File\\\"
+    #     \\\${unregisterExtension} \\\".mscz\\\" \\\"Compressed MuseScore File\\\"
+    # ")
 
     file(TO_CMAKE_PATH $ENV{PROGRAMFILES} PROGRAMFILES)
     SET(CPACK_WIX_ROOT "${PROGRAMFILES}/WiX Toolset v3.11")
     SET(CPACK_WIX_PRODUCT_GUID "00000000-0000-0000-0000-000000000000")
-    SET(CPACK_WIX_UPGRADE_GUID "4975850F-912F-47AE-AF2C-65C592188FCE")
+    SET(CPACK_WIX_UPGRADE_GUID "301B470A-5AC4-43B3-A71F-F8C68796096A")
     SET(CPACK_WIX_LICENSE_RTF   "${PROJECT_SOURCE_DIR}/LICENSE.rtf")
     SET(CPACK_WIX_PRODUCT_ICON "${PROJECT_SOURCE_DIR}/mscore/data/mscore.ico")
     SET(CPACK_WIX_UI_BANNER "${PROJECT_SOURCE_DIR}/build/packaging/installer_banner_wix.png")
diff --git a/build/packaging/WIX.template.in b/build/packaging/WIX.template.in
index cce74e66838f6..70a4a2368aa7c 100644
--- a/build/packaging/WIX.template.in
+++ b/build/packaging/WIX.template.in
@@ -74,14 +74,15 @@
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\$(var.ShortProdName)\Capabilities" Name="ApplicationIcon" Value="[INSTALL_ROOT]bin\$(var.ExeName),0" Type="string" />
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\$(var.ShortProdName)\Capabilities" Name="ApplicationName" Value="$(var.ProdName)" Type="string" />
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\$(var.ShortProdName)\Capabilities\DefaultIcon" Value="[INSTALL_ROOT]bin\$(var.ExeName),1" Type="string" />
-            
+            <!--
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\$(var.ShortProdName)\Capabilities\FileAssociations" Name=".mscz" Value="MuseScore.mscz" Type="string" />
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\$(var.ShortProdName)\Capabilities\FileAssociations" Name=".mscx" Value="MuseScore.mscx" Type="string" />
-            
+            -->
             <!-- TODO add more types?-->
-            
+            <!--
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\$(var.ShortProdName)\Capabilities\MIMEAssociations" Name="application/x-musescore" Value="MuseScore.mscz" Type="string" />
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\$(var.ShortProdName)\Capabilities\MIMEAssociations" Name="application/x-musescore+xml" Value="MuseScore.mscx" Type="string" />
+            -->
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\$(var.ShortProdName)\Capabilities\shell\open\command" Value="&quot;[INSTALL_ROOT]bin\$(var.ExeName)&quot; &quot;%1&quot;" Type="string" />
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\RegisteredApplications" Name="$(var.ProdName)" Value="SOFTWARE\$(var.ShortProdName)\Capabilities" Type="string" />
 
@@ -121,7 +122,7 @@
             <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\Classes\Applications\$(var.ExeKey)\shell\open\command" Value="&quot;[INSTALL_ROOT]bin\$(var.ExeName)&quot; &quot;%1&quot;" Type="string" />
 
             <!-- MyApp.Document ProgIDs -->
-            <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\Classes\MuseScore.mscz" Value="Compressed MuseScore File" Type="string"/>
+            <!-- <RegistryValue Root="$(var.RegistryRoot)" Key="SOFTWARE\Classes\MuseScore.mscz" Value="Compressed MuseScore File" Type="string"/>
             <ProgId Id="MuseScore.mscz" Description="Compressed MuseScore File" Advertise="no" Icon="$(var.ExeId)" IconIndex="1">
                 <Extension Id="mscz" Advertise="no">
                     <Verb Id="open" TargetFile="$(var.ExeId)" Command="Open" Argument="&quot;%1&quot;" />
@@ -136,6 +137,7 @@
                     <MIME Advertise="no" ContentType="application/x-musescore+xml" Default="no" />
                 </Extension>
             </ProgId>
+            -->
         </Component>
 
         <FeatureRef Id="ProductFeature">