Beamng on Steam

I was just wondering. I would like to have Beam on Steam but I already have it downloaded onto my computer not on steam. If I downloaded it onto steam would I have to but the game again?
Thanks

 

You just put your key in to steam and download it, I would advise you delete the none steam one first and if you want to keep any mods place them in a folder till it's installed on steam then go to Steam\SteamApps\common\BeamNG.drive put them in the folders as before.

 

thanks I'll do that