I read that it cannot be used on windows XP, first of all is that true? Anyways I'm using version 2.65 (it made me, I couldn't use an earlier version it would always update automatically) and every time I try to open something, two errors come up. "Error removing FF hash blocks: Arithemtic operation resulted in an overflow" and then when i press OK, The process (where the file is) cannot be accessed because it is being used by another process (which is untrue). And again theres a Microsoft .NET framework error "Unhandled exception has occurred in your application, if you click continue, the application will ignore and attempt to continue" And when I click continue it just kinda freezes and Backend thing comes up. Please help idk what to do D: