OK, I uninstalled all occurences of Animation Master off of my computer. I then went through my registry and removed anything that was Hash, Inc. and then shut down. Once I started up again I installed AM v10n. I doublechecked my obj10.hxt and made sure it was the same file siz as you mentioned, it was. I placed the obj10.hxt file in to the hxt directory. I started up AMv10 and the obj plugin was still missing. I rebooted and retried, same outcome, the new hxt doesn’t show. Just for the heck of it I removed the obj10.hxt and put in your last obj.hxt, which worked perfectly.
Here is the OBJ10.hxt that I have been using. Can you see if this one works for you? If it doesn’t, that would mean the obj10.hxt I have is corrupted. If it does work then maybe there is something on your machine that you have that I do not. Is the machine you use the one you developed the plugin on?
I appreciate you taking the time to sort this out

