A long shot, but have you tried if any of these workarounds would work (shameless plug)?
https://www.benchmarksims.org/forum/entry.php?3447-64-bit-BMS-Launch-Problems-with-64-bit-Windows-10
The link is for 4.33, but the tips may still work for 4.34.
Hi again.
Finally I’ve found what was causing this CTD. It was the MSI Afterburner utility. I’ve used this tool for years without any problems with Falcon BMS or any other programs.
I don’t know the reason, but after these recent updates in Windows 10, if I have Afterburner running BMS crashes on launching.
So the solution is simple, remove this tool from Windows start and BMS will work again
I tried every damn thing and this is just to annoying it’s sad because this sim looked really cool, but honestly I am kind of done because I have tried for three hours to get this to work and have tried every proposed solution.
I rather just fly than to fight with the sim to get it working so DCS will do for now.