IFK if i get it right but, if you run vanilla exe after installing 1.13 it messes your whole installation. Reinstall and don't even touch original exe. To be honest i delete ja2.exe after installing ja2 because the sci's don't overwrite it. They come with a name like ja2_6082.exe so if you run ja2.exe instead of ja2_6082.exe then *boom* gone is the day's work.