This does nor sound like the baulderdash fix pach to me
If it was "ease of use" then there is an easy way to fix
If it was EoU then go to cdrive/program files/black Isle/bgII
look for a box, blue stripe/border called Ease of use double click and follow the dos prompt, select uninstall mutiple strong holds
What I don't understand is that to activate EoU you have to go through the above noted process
One question
Why would you uninstall ???
Way more quests, i love the druid quest as a mage
lots more exp extends the game by miles