Just bought it on Steam and got it running... Tried using "Previous Build" using password "JustInCaseWeNeedIt" as one thread suggested and it wont download(update) that game. I do have it installed on another drive other than C if that matters. I tried dowloading the D3X9_42.dll and plopping into RS2014 root directory which would not allow game to start. Kind of running out of ideas here.

2 hours ago, Gumbi918 said:

I fixed it! I cleared my browser cache and redownloaded the 3.5 installer and it worked. I don't know why but apparently it was firefox's fault... at least on my end.

Great, I was able to use it also. Either it got updated again on the back end or my last PC reboot must have cleared the cache (on chrome for me).

Well I'd like to share my experience:

I've installed Rocksmith in another partition, not in C, and I was having trouble trying to patch it with CDLC 3.5 because it kept saying my copy was not legit. So I moved my installation folder to C and was able to patch it, BUT, for some other reason my game started crashing when I tried running it, so I just reinstaled the game, this time on C and patched it again and now everything's working just fine.

If you have the new version that was just put on Steam you need the latest CDLC patcher that we have available. Make sure you have a fresh install of the game and you may need to clear your browser's download cache as it will try and use the old one if you downloaded it before.