Re: Sims 4 will not launch on EA app
@tonibee88 The next step is to test your mods and custom content to find out whether any of the files are now incompatible with the game. Start with this list of content known to be broken after the latest major patch:
For everything else, you'll need to test yourself. If you have a lot of files to go through, the 50/50 method can make the process much more efficient:
https://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content#The_50.25_Method
Once you've sorted through your Mods folder, you can transfer your saves and Tray (saved households and builds) folders, plus Screenshots and Recorded Videos if you care about those. The rest can be discarded.