As of version .54497 I have been unable to load the map and begin a game. I am able to navigate the menus and create games, but once I reach the "Starting" screen the game just sits, I let it sit for 15 minutes this last time to see if it was just a load time issue. Also I am using the prebuilt 2 planet maps, nothing custom. Attached is my DXDiag. Just a few FYI: I updated my graphics drivers to the most recent version 2 days ago. I have tried loading though both the stand alone loader and Steam with the same result. I really enjoyed playing the game prior to this update, and I know the guys at UBER are working hard so I have no doubt that this issue will be resolved in the next version or so. Keep up the good work guys!
Frist try to run current version though Uber launcher. Then try those things: Try to enable "Threaded optimization" in Nvidia control center. After you run game try to set "High" process priority for PA.exe though Task manager. Try to play in windowed mode. Also, if you have any CPU-intensive programs working in background stop them before run PA.
It appears that forcing "Threaded Optimization" to "On" has resolved the issue. Thank you for your assistance.