Already purchased game, need to redownload

Hi, I purchased Drive about 8 months or so ago, and never really kept up with updating it. Now, I've seen the new maps and cars etc. and when I tried to use the 'update.exe' tool, it fails about a third of the way through, saying it couldn't find version.txt. I found on here that apparently means that my version is so old I can't use update.exe to update it and I have to redownload the whole kit and kaboodle... So, my question is: how do I do that without paying for the game again?

 

install steam, use your steam key you got when you bought the game, then update / download game via steam.

 

I got the game before it was available on steam. I don't have a "steam key".

 

Links to claim them were emailed out ages ago. There was also a banner up at the top for claiming them that would take you to a page where you could do it, of course that banner is long gone. Support should be able to help.

 

This should be of assistance
http://wiki.beamng.com/index.php?title=BeamNG_Steam_Steps