Windows Get Stuck in Top Left corner after upgrading to Mavericks
There is a way to get the windows back to normal without quitting the app, but it's not ideal.

If you move the dock, the applications will move back into place, the easiest way is to click the  and go to dock, then change the position, then repeat to put it back to where you had it originally.

https://discussions.apple.com/message/23766770#23766770