I installed CM on a different machine, and it works fine, so my guess in the above post is wrong.
I tried deleting the additional "Jamirah" entry in NPCShort, NPCShort2, Bestiaryshort, and Bestiaryshort2, but only one entry exists (in NPCshort2). Nevertheless, 2 Jamirah entries exist in the monster list while the application is running, and hovering over the second causes a crash.
As I have said, I've tried uninstalling (both via the windows 10 apps and features page as well as manually deleting all files in the directory. I have administrator priveleges, so all I can think of is that its storing data somewhere else nonobvious?