Already started, great minds
I must say that it's a pain that my hard copies are now useless though. From reading various sources I now know this is a persistent problem which seems to have effected CD Projeck Red's server's for some time, I really thought they would have tried to fix it as this installation has cost me 1/2 a day of precious time and huge amounts of bandwidth. Anyways, downloading the GoG version now. I assume I must uninstall my current game though?
Also I'm not sure if this physical copy has been Backed-up on my primary GoG account, are you able to check?
We don't have access to GOG data from here. But if you can download from GOG, then it worked. It should appear in your GOG library.