For 1.69, if your files are named like this: If you’ve followed my OLD GUIDE, you need to do these steps first:
The only problem with this method is that you have to make an account at NexusMods to download the limiter, but that’s easy as accounts there are free. In fact one such person in particular, aka Radical Clown Friendhas found a better way to limit Sims 3 FPS both for windowed and fullscreen modes, with just a few clicks. Some people encountered errors with the FPS Limiting method I posted few days earlier and because of that, another method of FPS limiting was found.