Are you able to enter the license code?

I don't see a place to enter the activation/licensing code.  

That is strange. Frankly, I would just try restarting the computer and see if that resolves the issue and, if not, then I would reinstall the software from a download.

I have had the activation thing happen to me on one of my machines (it demanded I enter a code after I started the program despite the fact that nothing had changed); it was resolved by a restart.

I tried restarting; did the same thing.

Did you try uninstalling and reinstalling the program? 

I would recommend doing a full backup prior to the uninstall, however.

Not yet; I'm saving that for last. Thanks!

Did you turn off your antivirus program when installing it or downloading it?  Seems like I saw a recent FAQ for white screen recently. I'm searching.

TT support  confirmed the need to uninstall and re-install with anti virus turned off. 

I turned off McAfee.  I still have the same problem. 

Do I need to turn off Windows Defender too (windows 10)?