I actually got this resolved the same day. I had some weird customizations going on in my regional settings. Locale was GB and I had customized it so it used Dutch decimal settings.
I did this for a game where you couldn't select the language, it would just pick it from your regional settings. I hate playing games in Dutch, it just looks weird.
Anyway, got this fixed by putting everything back to default in my regional settings (Dutch in my case), removing every trace of Elemental from my computer, so an uninstall and the folders C:\ProgramData\Stardock\Elemental - War of Magic and C:\Documents\My Games\Elemental. Ran a registry cleaner to remove all registry items for Elemental and installed it again. Ui is fine now.
Don't have an ati card so don't know if your issue is related.