Okay, I had a problem that I fixed, but, I still want to know why it happened.
Today I downloaded All Forged Up and All Fixed Up from Fileball, as well as the Apocalypse Beta. Both All Forged up and All Fixed Up crashed Aleph One before the map began. I didn't really care. Then I started playing Siege of Nor'Korh, and, to my dismay, it was using the Apocalypse physics. I tried everything (except the thing I did to fix it at the end). I deleted everything related to Apocalypse and the problem persisted. I finally deleted my Aleph One preferences and now it works. Does anyone know why this happened?