Back to being stable
Still no idea why PM 5.9 starts and immediately exits tho'
Just copy/paste the command line or config from V5.8 to V5.9, and it should work.
What usually works with upgrades before, but now, no...
Won't even work with the supplied batch file.
Then I would try with older drivers. Dev's did not state anything about Nvidia drivers, but the one you using ( 511.23 ) is brand new released a couple of weeks ago.