Elements 2021 Editor not opening on PC

I'm having the same problems on a Windows after installing Elements 2021, after upgrading from v17 .  No Editor. I have to use the TOPAZ editors instead because the Adobe ones don't work.  And from what I can read in Adobe's marketing mataerial, the editor won't work off=line anyway.  I do outdoors photography and edit in the field, far from the internet.