diff --git a/development/Win32/packaging/AltInstaller/InstallActions-update.nsh b/development/Win32/packaging/AltInstaller/InstallActions-update.nsh
index 08c7d1a251..3a13131c88 100644
--- a/development/Win32/packaging/AltInstaller/InstallActions-update.nsh
+++ b/development/Win32/packaging/AltInstaller/InstallActions-update.nsh
@@ -226,50 +226,52 @@ Function RefreshRegUninst
   # ImageMagick
   ReadRegStr $0 SHCTX "Software\ImageMagick" "OnlyWithLyX"
   ${if} $0 == "Yes${PRODUCT_VERSION_SHORT_OLD}"
-   # set the new path
    WriteRegStr HKLM "SOFTWARE\ImageMagick" "OnlyWithLyX" "Yes${PRODUCT_VERSION_SHORT}"
-   ReadRegStr $0 HKLM "Software\ImageMagick\Current" "BinPath"
+   # set the new path
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\Current" "BinPath"
    ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0 # macro from WordFunc.nsh
    WriteRegStr HKLM "SOFTWARE\ImageMagick\Current" "BinPath" "$0"
-   ReadRegStr $0 HKLM "Software\ImageMagick\Current" "CoderModulesPath"
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\Current" "CoderModulesPath"
    ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
    WriteRegStr HKLM "SOFTWARE\ImageMagick\Current" "CoderModulesPath" "$0"
-   ReadRegStr $0 HKLM "Software\ImageMagick\Current" "ConfigurePath"
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\Current" "ConfigurePath"
    ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
    WriteRegStr HKLM "SOFTWARE\ImageMagick\Current" "ConfigurePath" "$0"
-   ReadRegStr $0 HKLM "Software\ImageMagick\Current" "FilterModulesPath"
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\Current" "FilterModulesPath"
    ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
    WriteRegStr HKLM "SOFTWARE\ImageMagick\Current" "FilterModulesPath" "$0"
-   ReadRegStr $0 HKLM "Software\ImageMagick\Current" "LibPath"
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\Current" "LibPath"
    ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
    WriteRegStr HKLM "SOFTWARE\ImageMagick\Current" "LibPath" "$0"
-   WriteRegStr HKLM "SOFTWARE\ImageMagick\Current" "Version" "${ImageMagickVersion}"
-   
-   ${COPY_REGISTRY_KEY} HKLM "Software\ImageMagick\${ImageMagickVersion_Old}" \
-                        HKLM "Software\ImageMagick\${ImageMagickVersion}" # macro from registry.nsh
-   DeleteRegKey HKLM "Software\ImageMagick\${ImageMagickVersion_Old}"
    # set the new path
-   ReadRegStr $0 HKLM "Software\ImageMagick\${ImageMagickVersion}\Q:16" "BinPath"
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "BinPath"
    ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
-   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion}\Q:16" "BinPath" "$0"
-   ReadRegStr $0 HKLM "Software\ImageMagick\${ImageMagickVersion}\Q:16" "CoderModulesPath"
-   ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}\Q:16" "+" $0
-   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion}\Q:16" "CoderModulesPath" "$0"
-   ReadRegStr $0 HKLM "Software\ImageMagick\${ImageMagickVersion}\Q:16" "ConfigurePath"
+   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "BinPath" "$0"
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "CoderModulesPath"
    ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
-   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion}\Q:16" "ConfigurePath" "$0"
-   ReadRegStr $0 HKLM "Software\ImageMagick\${ImageMagickVersion}\Q:16" "FilterModulesPath"
+   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "CoderModulesPath" "$0"
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "ConfigurePath"
    ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
-   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion}\Q:16" "FilterModulesPath" "$0"
-   ReadRegStr $0 HKLM "Software\ImageMagick\${ImageMagickVersion}\Q:16" "LibPath"
+   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "ConfigurePath" "$0"
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "FilterModulesPath"
    ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
-   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion}\Q:16" "LibPath" "$0"
+   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "FilterModulesPath" "$0"
+   ReadRegStr $0 HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "LibPath"
+   ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
+   WriteRegStr HKLM "SOFTWARE\ImageMagick\${ImageMagickVersion_Old}\Q:16" "LibPath" "$0"
   ${endif}
   
   # Ghostscript and GSview
   ReadRegStr $0 HKLM "SOFTWARE\GPL Ghostscript" "OnlyWithLyX"
   ${if} $0 == "Yes${PRODUCT_VERSION_SHORT_OLD}"
-   WriteRegStr HKLM "SOFTWARE\GPL Ghostscript" "OnlyWithLyX" "Yes${PRODUCT_VERSION_SHORT}"
+  WriteRegStr HKLM "SOFTWARE\GPL Ghostscript" "OnlyWithLyX" "Yes${PRODUCT_VERSION_SHORT}"
+   # set the new path
+   ReadRegStr $0 HKLM "SOFTWARE\GPL Ghostscript\${GhostscriptVersion_Old}" "GS_DLL"
+   ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
+   WriteRegStr HKLM "SOFTWARE\GPL Ghostscript\${GhostscriptVersion_Old}" "GS_DLL" "$0"
+   ReadRegStr $0 HKLM "SOFTWARE\GPL Ghostscript\${GhostscriptVersion_Old}" "GS_LIB"
+   ${WordReplace} $0 "${PRODUCT_VERSION_OLD}" "LyX ${PRODUCT_VERSION}" "+" $0
+   WriteRegStr HKLM "SOFTWARE\GPL Ghostscript\${GhostscriptVersion_Old}" "GS_LIB" "$0"
   ${endif}
 
 FunctionEnd
diff --git a/development/Win32/packaging/AltInstaller/LyXInstaller-update.nsi b/development/Win32/packaging/AltInstaller/LyXInstaller-update.nsi
index 32db32e263..3669f64362 100644
--- a/development/Win32/packaging/AltInstaller/LyXInstaller-update.nsi
+++ b/development/Win32/packaging/AltInstaller/LyXInstaller-update.nsi
@@ -80,8 +80,6 @@ Var UserName
 !insertmacro LineFind
 !include "WordFunc.nsh"
 !insertmacro WordReplace
-!include "registry.nsh"
-!insertmacro COPY_REGISTRY_KEY
 
 # Set of various macros and functions
 !include "LyXUtils.nsh"
diff --git a/development/Win32/packaging/AltInstaller/Settings.nsh b/development/Win32/packaging/AltInstaller/Settings.nsh
index 8d3bea4166..d90af18d00 100644
--- a/development/Win32/packaging/AltInstaller/Settings.nsh
+++ b/development/Win32/packaging/AltInstaller/Settings.nsh
@@ -44,6 +44,7 @@ BrandingText "LyXWinInstaller v3.20 - ${INSTALLER_VERSION}"
  !define PRODUCT_VERSION_SHORT_OLD "151"
  !define JabRefVersion "2.2" # could be an older version
  !define ImageMagickVersion_Old "6.3.5" # could be an older version
+ !define GhostscriptVersion_Old "8.60"
  !define MiKTeXDeliveredVersion "2.6" # could be an older version
 !endif