Restarting solved most of the issues (able to enter new areas, Karaea spawned by herself etc.), but Thalantyr still did not have any new items. Will he always have new items with the mod, or is it random?
I did in fact install Aurora during a game in progress. And yes, Melicamp was turned into his human form so I think you have found the problem!
Oddly enough, some of the stores have been updated with Aurora's items (such as the Temple of Lathander outside Beregost), but not Thalantyr. Also, I had to manually spawn Karaea, I was unable to enter her "lair" (no "open door" marker at the coordinates), and was likewise unable to enter the cave north of Nashkel (again no "open door" marker). I will try to start a new game and see if these locations become accessible and if Thalantyr gets some new items. Will upload those files if starting a new game does not fix things.
Uninstalled Aurora's Shoes and was able to enter High Hedge without a crash. Melicamp was in there as well (forgot about him), but was still able to spawn him when I reinstaalled Aurora's Shoes. However, still crashed on entering the building with it installed. I do have the "Logging On=1" entry, but crashing did not produce an entry in the baldur.err file.
I have attached the requested files (except _ar3202.bcs - could not find it in override or Near Infinity).