Unfortunately not. I emptied my trash, loged out/in again without changes. Even creating a new zip (by using the Finder) I'm not able to watch the content in Xee.
Is there a way to determine whether or not Xee has found The Unarchiver?
Have a look at the Xee Preferences. There's a panel named Formats, uncheck the last two items and Xee wont open your archives anymore.