We are aware that Full Tilt pushed a large update today.
Please restart PT4 using the logging enabled link on your Start Menu, reproduce this problem and then report it via our
support system with the log file - that will help us figure out what is going on here and get it fixed for you. You can find that file by clicking File --> Show User Data Folder in the main PT4 window - the file we need is the text file called PokerTracker4 that is in that folder.
Post your ticket number here once you've created it and I'll make sure this gets prioritized appropriately.