Since I hadn't cleaned out my temp folder, I tried this in Gimpei's save (from the original 1.004 download version). The first procedure did not help with Zaknadrix, but the updated version did (both imps). You may want to edit your first post and remove that version.
The internal name in the disk version of the game is also Zanadrix, rather than Zaknadrix. It never occurred to me to try altering the names listed in the NPC section of the data.000 file... That must get them off someone's naughty list, or something.
I've only seen this issue mentioned twice, so I don't think it is a consistent problem with the GOG version.
Thanks for the fix, and welcome to the forum.
