Re: Sims crashes on launch- please help me

@BluStorm180  You can move your saves from the old Sims 4 folder to the new one.  They're in the saves folder, naturally.

However, if you use any mods or custom content, please test that first in the clean folder, as that may be the reason you couldn't play.  Use the 50/50 method if you have a lot of files:

https://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content#The_50.25_Method

Once you've sorted out the Mods folder, move over the saves as well as the contents of Tray (saved households and builds), plus Screenshots and Recorded Videos if you care about those.  The rest can be discarded.