Re: Sims 3 not launching, EA app update required
@blorrainej This is a known issue:
You can try clearing the EA App's cache:
https://help.ea.com/en-us/help/faq/clear-cache-to-fix-problems-with-your-games/
and repairing the game: open your EA App game library, click Sims 3, and select Manage > Repair. There is of course no actual update available, but repairing may reset whatever is broken.
If that doesn't help, uninstall the EA App with Revo Uninstaller (the free version is fine) and reinstall it.