Sims 3 Crashes on Main Screen

Hello,

I wanted to play The Sims 3 again today, and I went ahead and downloaded some custom content from the Sims Resource. When I finally tried to run the game, it completely locked on the main screen. As in, I couldn't even use ctrl+alt+del to get out of it, I had to hit the restart button.

I thought maybe I accidentally installed some bad content, and took the entire folder of .package files out and when that dudn't fix it, replaced them and tried to run it without the content installed through the launcher. No dice. I have no idea what to do. If anyone has any advice for this, please help me.

If it's relevant, I have the game on patch 1.67 (the last, I think) and I do not have Origins downloaded and installed, though that has never proven an issue before.

Thank you.