Here's a cheat version, that still tied to Graal.
Save it as updatecache.bat (or whatever you like..) and store it in your Graal folder.
PHP Code:
@echo off
echo Deleting cache.
del FILENAMECACHE.txt
echo Deleted.
echo Opening Graal.
echo Exit when you've reached login screen.
Graal.exe
echo Cache updated.
Clicks required: 2