Exiting Corel, then pop-up add loops and I can't turn it off!

Currently have version 2019 for Windows 10. This also happened with version 2018... was hoping the upgrade would fix it :-(

Corel works fine until I try to exit.

I then get the pop-up adds, and it keeps trying to display the "upgrade to v2020", I close this window, then a v2019 window appears. I close it and it goes back to the "upgrade to v2020" window!

I then have to use Windows Task Manager to shut down Corel.

(you can see the two windows in the screen shot below.)

Any help would appreciated!