I created a different user on the same machine.
I logged with the addons enabled and disabled.

Wouldn't the incompatibility cause all the users to have the same problem, rather than one not and all others to have the problem?
Attached is the file that you requested.

I am quite aware of that each user has there own keys and configurations.
I added a third user to the computer, configured them the same as the first user, and was not able to sign or encrypt any emails.
When I clicked on the lock nothing happened.