Mm, seems this mod hasn't been maintained in a while. Which is too bad because it is a real gem, I love it. :-)
Anyway, I found two bugs so far in the latest version, v7.
1) When fighting undead with the Fist of Amaunator, it damages the wielder, not the undead because of a targeting issue in the item definition.
2) During the talks with Aidan, giving certain replies can make the conversation exit early with Aidan standing around doing nothing. This is most likely also the cause of the "Aidan not appearing" issue I've seen some people report.
I took the liberty of creating a hotfix that fixes both issues. This zip file contains only the files I changed, not the whole mod! Unzip this file after unpacking the mod but before installing it. (Or if you already installed it, reinstall it after applying the hotfix.)