[Kind of SOLVED]
That file was empty. as i wrote, i uninstalled the game again, and tried to delete ALL the files in Doc´s and make sure all files in **Steam\commonapps\blabla\Blabla was deleted. downloaded it again, installed it.
started the game again. got the same error. but this time, the game did not crash. i did one thing differently this time. i unplugged my Futaba T16IZ radio before i started the game for the first time after i re-installed it.
it kind of works. but i dont understand WHY the game try to use a different language. My Win OS is English British, all of it. and my keyboard is Swedish. the game should be by default use the default language (English) without even trying to use a language that is not used anywhere in my PC. And even if the installer found a "language" in my Futaba radio (Futaba uses Windows CE) it´s still English. (as a IT person, i never use Swedish language in any of my PC´s not in Windows, not in Linux, only my keyboard is set up for Swedish keyboard layout)