Win installer: added additional validation into uninstaller for cases when uninstaller was moved from product folder by some reason and then it was run.

build/conf/nsis/idea.nsi

@@ -1045,11 +1045,17 @@ HKLM:
 cant_find_installation:
   ;admin perm. is required to uninstall?
   ${If} ${RunningX64}
+look_at_program_files_64:
     ${UnStrStr} $R0 $INSTDIR $PROGRAMFILES64
+    StrCmp $R0 $INSTDIR HKLM look_at_program_files_32
   ${Else}
+look_at_program_files_32:
     ${UnStrStr} $R0 $INSTDIR $PROGRAMFILES
+    StrCmp $R0 $INSTDIR HKCU uninstaller_relocated
   ${EndIf}
-  StrCmp $R0 $INSTDIR HKLM HKCU
+uninstaller_relocated:
+    MessageBox MB_OK|MB_ICONEXCLAMATION "$(uninstaller_relocated)"
+    Abort
 Done:
 FunctionEnd
 

build/conf/nsis/idea_en.nsi

@@ -18,5 +18,6 @@ LangString current_version_already_installed ${LANG_ENGLISH} "Current version of
 LangString uninstall_previous_installations_title ${LANG_ENGLISH} "Uninstall old versions"
 LangString uninstall_previous_installations ${LANG_ENGLISH} ""
 LangString uninstall_previous_installations_prompt ${LANG_ENGLISH} "Select the ${MUI_PRODUCT} version$2 that you want to uninstall."
+LangString uninstaller_relocated ${LANG_ENGLISH} "Uninstall hasn't detected folder of ${MUI_PRODUCT} installation. Probably uninstall.exe was moved from the installation folder."
 LangString empty_or_upgrade_folder ${LANG_ENGLISH} "Please select an empty folder."
 LangString application_running ${LANG_ENGLISH} "$INSTDIR is running. Close the application and retry the installation."