Today I've had a few share of problems with A20 Plus Final. It was working perfectly last week, but I tried playing it today and suddenly, the game had issues.
Maybe some Windows update or some program I installed/uninstalled screwed things over...
First, I had the "white screen, instant crash" when opening the game and the EXCEPTION_ACCESS_VIOLATION error in log file.
Installing the DirectX 9 Redist fixed the crash issue for me, thanks for sharing the tip!
Then I had another issue: After choosing certain songs, they weren't being loaded and thus soft-locked the game. Turns out those were the songs with videos.
Another clue was that my title screen and song selection screen had a black backgound instead of the normal video background.
So, I updated K-Lite Codec Pack to the latest version, and then, this video issue was fixed.
After that, I was able to play A20 Plus Final perfectly on the blue theme, didn't need to force the gold theme, mess with other .dlls and stuff.