BiNGE: I ended up figuring it out a couple days ago, but I needed to get rid of every scrap of it on my PC's registry and reinstall. This was strange because I patched it all the way to the current version and still had the 1.11 DLC registration quest on the notice board.
The troll dlc can be a bit dfificult to update properly through patches, sometimes the overwrite of the old file doesn't go all that well, but deleting the troll.dzip file from the cooked pc folder and dropping a 'good' troll.dzip in it usually takes care of the issues.