I know this is about a month old, but I'm running into this stupid issue with the Runtime error after I log into Uplay. I had a drive crash (not my win install) and now having issues since it was where my games were located. In the log it shows that it can't parse the install state of a game. I have no method of removing that game. If I don't click on the runtime error I can still navigate (partially) within Uplay. There is no download or uninstall option for the game.
So to John11 - How did you uninstall the game?
I can't figure out how Uplay knows what game should or shouldn't be installed. I uninstalled it, removed registry keys associated with Uplay, deleted the Ubisoft folders that it slid into AppData. It's freaking weird. For the love of god why did every studio have to make their own Steam app. Sadly the Ubisoft titles I purchased through Steam work fine lol.