2019 won't open

Just purchased the license yesterday (standard) and it worked fine until today. Now, any time I try to open the software, the splash screen loads then closes after a few seconds without any popup or warning.

Does anyone have any ideas as to what is causing this and/or how to fix it? It was one thing to put up with this stuff when it was free, but now that I've purchased a license it's much more frustrating.