Re: change sims 4 to 64 bit pc

@slncrn  Your game needs to be closed to access the option.  If that's not he issue, try a repair first, on the same menu as Game Properties.

If you can't do that either, clear Origin's cache, restart your computer and try again.

https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/