Substance painter not opening - white screen

Hi. I have two computers. The old one works fine. My new built computer, a clean install of Windows and I installed Substance Painter (latest version as of today). After the installed it did run. I closed down, then reopen and it open the splash screen then screen goes full white, nothing but white and it never moves forward.

I uninstalled and try a early version but same result. Before you ask for a crash log - how do I do this please.

I am running a AMD Threadripper and have 2 RTX 3090 video cards. 

Help please as I can not use Painter on my new system.