Win installer: fix registry issue

- when installing LyX 2.x.z over a previous 2.x.y installation a registry key was not deleted
- also fix some hardcoded occurrences of "lyx"

development/Win32/packaging/installer/include/declarations.nsh

@@ -37,6 +37,7 @@ Configuration of LyX installer
 # Names and version
 
 !define APP_NAME "LyX"
+!define APP_NAME_SMALL "lyx"
 !define APP_VERSION_NUMBER "${APP_VERSION_MAJOR}.${APP_VERSION_MINOR}.${APP_VERSION_REVISION}.${APP_VERSION_BUILD}"
 # for the proposed install folder we use the scheme "LyX 2.2" while we need for the registry the scheme "LyX 2.1.4"
 # to check if it is exactly this version (to support side by side installations)
@@ -57,7 +58,7 @@ Configuration of LyX installer
   !define APP_SETUPTYPE "Standard"
 !endif
 
-!define BIN_LYX "LyX.exe"
+!define BIN_LYX "${APP_NAME}.exe"
 !define APP_RUN "bin\${BIN_LYX}"
 
 !define APP_REGKEY "Software\${APP_NAME}${APP_SERIES_KEY}" # like "LyX220"
@@ -66,8 +67,8 @@ Configuration of LyX installer
 
 !define APP_REGNAME_DOC "${APP_NAME}.Document"
 
-!define APP_EXT ".lyx"
-!define APP_MIME_TYPE "application/lyx"
+!define APP_EXT ".${APP_NAME_SMALL}"
+!define APP_MIME_TYPE "application/${APP_NAME_SMALL}"
 
 !define APP_UNINST_KEY "Software\Microsoft\Windows\CurrentVersion\Uninstall\${SETUP_UNINSTALLER_KEY}"
 
@@ -81,7 +82,7 @@ Configuration of LyX installer
   !define SETUP_EXE ${ExeFile}
 !endif
 
-!define SETUP_ICON "${FILES_ICONS}\lyx.ico"
+!define SETUP_ICON "${FILES_ICONS}\${APP_NAME_SMALL}.ico"
 !define SETUP_HEADERIMAGE "graphics\header.bmp"
 !define SETUP_WIZARDIMAGE "graphics\wizard.bmp"
 !define SETUP_UNINSTALLER "Uninstall-${APP_NAME}.exe"

development/Win32/packaging/installer/setup/configure.nsh

@@ -46,7 +46,7 @@ Section -InstallData
   
   WriteRegStr SHCTX ${APP_UNINST_KEY} "UninstallString" '"$INSTDIR\${SETUP_UNINSTALLER}"'
   WriteRegStr SHCTX ${APP_UNINST_KEY} "DisplayVersion" "${APP_VERSION}"
-  WriteRegStr SHCTX ${APP_UNINST_KEY} "DisplayIcon" "$INSTDIR\bin\lyx.exe"
+  WriteRegStr SHCTX ${APP_UNINST_KEY} "DisplayIcon" "$INSTDIR\bin\${APP_NAME_SMALL}.exe"
   WriteRegStr SHCTX ${APP_UNINST_KEY} "URLUpdateInfo" "${APP_WEBPAGE}"
   WriteRegStr SHCTX ${APP_UNINST_KEY} "URLInfoAbout" "https://www.lyx.org/AboutLyX"
   WriteRegStr SHCTX ${APP_UNINST_KEY} "Publisher" "${APP_NAME} Team"
@@ -58,8 +58,10 @@ Section -InstallData
   # if we install over an older existing version, remove the old uninstaller information
   ${if} $OldVersionNumber < ${APP_SERIES_KEY}
    DeleteRegKey SHCTX "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APP_NAME}$OldVersionNumber"
+   DeleteRegKey SHCTX "SOFTWARE\${APP_NAME}$OldVersionNumber"
    # also delete in the case of an emergency release
    DeleteRegKey SHCTX "Software\Microsoft\Windows\CurrentVersion\Uninstall\${APP_NAME}$OldVersionNumber1"
+   DeleteRegKey SHCTX "SOFTWARE\${APP_NAME}$OldVersionNumber1"
   ${endif}
   
 SectionEnd

development/Win32/packaging/installer/setup/install.nsh

@@ -18,7 +18,7 @@ Section -ProgramFiles SecProgramFiles
   # be installed directly to C:\programs - the uninstaller will then delete the whole
   # C:\programs directory
   StrCpy $String $INSTDIR
-  StrCpy $Search "LyX"
+  StrCpy $Search "${APP_NAME}"
   Call StrPoint # function from LyXUtils.nsh
   ${if} $Pointer == "-1"
    StrCpy $INSTDIR "$INSTDIR\${APP_DIR}"