Edit: Fixed by installing both pre release beta patches.
I installed Take On Helicopters from Sprocket, but when starting up I get the following error:
"This version of D:\Program Files\Bohemia Interactive\Take On Helicopters\TakeOnH
.exe is not compatible with the version of Windows you're running. Check your co
mputer's system information to see whether you need a x86 (32-bit) or x64 (64-bi
t) version of the program, and then contact the software publisher."