Did you play a different mod before? I know that the game doesn't delete all options when switching mods, so maybe try to do a PLAY NOW game first.
For example if you play a mod that adds a new difficulty and then switch back to vanilla BTS it can crash because the last used difficulty is not defined.
Downloaded this tonite for my son who loves fantasy mods and it looks stunning and very well done When I tried to do the patch my anti-virus didnt like it for some reason? so not sure on the problem with that but will try it again later.
Yes, CIV4 + BTS + patch 3.17 (manually installed) + patch 3.19 (manually installed). I have FFH2 running stable, as well as the Start Trek mod. Only Master of Mana crashes.
I'm using Norton Internet Security and had the same problem with the patch at first. It quarantined it, I think in part because the patch had so few downloads or users that NIS couldn't verify its safety.
I went into the "Quarantine" section of the anti-virus program, selected the patch and removed it from the quarantine.
I don't know what anti-virus program you're using, but you might be able to do something similar.