Unable to launch or delete SK
So I haven't played SK in awhile, so I decided I would go ahead and reinstall it on steam. When it has finished downloading I go to play but to my surprise it says it is already running, so I'm unable to launch it. I tried launching it and restarting steam and my computer, but its always "running" but not in task manager or actually running on my pc. So I tried to delete and reinstall it, but of course I can't delete it cause' its running. I tried deleting it other ways but it always has same excuse. I decided to just leave it and come back at a later date after searching google for awhile and download the non-steam version you get off this website. But that wont open properly, it opens for about 2 seconds with only a black screen, it then just closes. So I'm unable to SK whatsoever, which is a little sad cause' I was excited to play it again.
Could I have any information to help launch them or successfully delete the steam version?
My steam name is Highlander.
EDIT: I reinstalled it on steam to find it do the same thing with the download from this site, the reason I belive is something to do with my computer obviously dislikes SK guess I wont be playing anytime soon :(
-Frysa