haven´t played it for a while and when i started gog it said it was not authorized but i got it with the Nvidia promo. I uninstalled it and now it wont let me downlaod the game

I get this error as well. I already have it installed but I can't download the DLC that was released today. I hope they fix it soon. The GOG forum was down today as was CDPR main forum site yesterday. GOG I love you guys but get your sh*t together.

same problem here! I have uninstall the game, uninstall gog and..... same issue.... "not allowed"
by the way I'm french

Q.: Upon installing the retail copy and redeeming the code on the website, the game fails to update through Galaxy with the status set to NOT AUTHORIZED.
A.: You need to 'purchase' the free DLC program first, once that is installed it should automatically go on with the updating process.

FAQ: http://www.gog.com/forum/the_witcher_3_wild_hunt/faq/post1

i already had the dlc installed. When i tried to update the game it wouldnt let me

I have already purchase the free dlc pack a long time ago.... and I can't re-purchase....