It seems like a lot of people have problems with this after the update so here a little how to help it.
You have to run DOTC in XP service pack 2 compatible mode.
Go to your dotc shortcut, right mouse button click it(not left! 😛 ), Click on Properties. Go to the tab compatibility, and click on: Run this program in compatibility mode for, choose Windows XP Service pack 2. Now click on apply and ok. And you're back in the game