It won't run!

[DerpGuy]

Ok so I used this site called can you run it. It said everything was fine except for I had Windows 8.
I have the game on Steam also.
I had the demo at first and I just downloaded Amnesia, the paid version.
When I downloaded it I tried to play it but it would constantly keep showing the launching tab and it looked like it kept refreshing and restarting.
So, I thought it had to do with the demo files. I did the verify the app cache thing first. Than I followed the part to delete the main settings thing and run it. I did, it did the same thing. When I did that I realized the folder it was in, the folder was called MainDemo so that is why I thought it had to do with the demo and the trouble of it launching. I deleted the MainDemo file and sent my Amnesia file to my Amnesia The Dark Descent file in my Steam folder.
I did the verify app cache and the Amnesia folder was deleted. Now, no folders called "Amnesia" showed up in my documents and I still can't play it.
What do I do?