PC "No Suitable Graphics Card Found" suddenly appears when I try to start the game

DippyDerps

Steampunker
I have 790 hours on Terraria and have never seen this message before, the game would run flawlessly every time I launched it. Now all of the sudden when I launched the game today, I got the message "No suitable graphics card found. Unable to create the graphics device." I already tried deleting my config.dat file, but that did nothing. Also, I downloaded and used TEdit yesterday to fix a problem with my world, and that's pretty much the only thing I've done differently in the 790 hours I've played.

Does anyone know how to fix this problem? ;(
 
Goto graphics control panel and change the graphic priority to terraria for that specified card.
 
Goto graphics control panel and change the graphic priority to terraria for that specified card.
And how to do this? Sorry but i'm no an expert in these things, i opened this: AMD catalyst control center but now i don't konw how to do that you say
 
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