The game shouldn't care if Windows has .div files associated with a program or not.
When you reinstalled the game, did you make sure all files were gone after you uninstalled, except for the saved game folders?
Are you shutting down all non-essential programs (especially anti-virus) before starting the game?
In Windows Explorer, if you browse to the '..\Beyond Divinity\Static' folder, can you open the tga files there in an image viewer (such as
IrfanView)?
You can try deleting the files
config.div,
slashed.cfg and
slashed-d3d6.cfg in the Beyond Divinity folder (if they exist), to force the configuration program to recreate them, but reinstalling the game should have done that already.
