Hello I think i have solved the Problem, for me worked this:
I had activated my Serial manually go directly to <yourHDD>:\DCS World\Mods\tech\CombinedArms\bin\x86_64\CombinedArms_protect.exe (i have an x64 OS)
AND THEN
i have to RENAME the file: G:\DCS World\Mods\tech\CombinedArms\bin\x86_64\CombinedArms.dll (CombinedArms1.dll was my choice)
I think you havent to activate CA if your done so far. But Rename IS necessary.
I tryed to rename back and it Crashes again. So i have renamed also again. It works fine for me
Please let me know if this works for someone :)