Please restart PT4 using the logging enabled link on your Start Menu, click Get Hands While Playing and play for a few hands until the HUD shows. Then report this issue 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.
Once we have your log we'll be in a much better spot to tell you exactly what's going on here and what steps to take.