gloomfrost: yep reinstalled it took out all the mods and the troll.dzip and it patched perfectly. Now to try in game, thanks CDPR and GoG.
Semi confirmed, I didn't re-install the game I just removed all mods and DLC. The GOG patcher worked fine.
I made a new folder and copied everything from the CookedPC folder which was not original and the DLC's into that. Moved it to my download folder, ran the GOG patcher and then put my mods and DLC back where they were.
Game save ran fine, nothing missing.
BTW, I never run the game from the launcher, I use the Witcher.exe.
The launcher always connects or tries to connect to the web and slows the game down.