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!