Hello.
Hope this info helps to solve this problem.
I get a similar behavior here with Win8.1/64bit.
VPT8 starts Loading, then 2 left windows appear: Preview and Projection window opens but main window doesn’t, and after 4 or 5 secs all goes away,and a window with the title "Max (64-bit)" appears with the following message:
"Max (64-bit) has stopped working. A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available."
Run as admin leads to the same behavior.
Thanks.
Miguel