It says I have VIP on this account because I bought it a few years ago when I had a working computer, but now that I can play HL2RP again I don't have the VIP benefits. I might not have them since I made a new character because all the ones I had were gone for some reason, do I have to buy it again?

I haven't played this (or anything on steam) in like 2 years because of a broken computer and I'm having trouble with the map for HL2RP on Garry's Mod.  I have tried downloading it twice from the download section, I put it in the addons folder as well as the maps folder just in case.  Is there something I'm missing?  It's been a while since I've done all this...