Slitherine

I installed the game a few days ago and played without any problems. Today, I can't move/deploy/fight any of my units in any campaign or scenario. I've uninstalled, rebooted and reinstalled the game, but I still can't make any units move or fight. AI opponent moves/fights ok. I can purchase units, but can't deploy them. What's wrong and how do I fix it?

I finally figured it out. If I choose 2-button mouse in options, I can't use my mouse to move anything in the game.