[Evolution] Certificate problem in Evolution

[ichglaubeso <evomaillist netthought com>]

Running Ubuntu 16.04.01 for OS, Firefox 49 (canonical 1.0), and Evolution 3.18.5.2 . Installed a Comodo email certificate for S/MIME signing/encryption into Firefox. Imported that certificate into Evolution. Set it up as the certificate for S/MIME signing/encryption on two different email accounts I wanted to use it with. Seemed to work fine. 

Noticed that certificate is specific to a unique email address, so decided to install two more, one specific to each of the two email addresses I wanted to use. Got as far as trying to assign to the specific email address in Evolution and can't go further because it wants a password that I do not have to my knowledge. The exact wording is Enter the password for 'NSS Private Key and Certifcate Services', token 'NSS Certificate DB' . Now I can't delete them from the Certificates list in Evolution or install any new ones, nothing without this password and I have no idea where or what that password could be. I've tried every password I have.

I'm looking for suggestions on how to delete the remaining certificates from the Evolution certificate list. Without the password it keeps asking for, I can't delete them. I've tried to delete them from the Firefox Certificate Manager, too, and can't for the same reason now. I have no idea of how to fix this problem and have tried certutil, etc. It just says that I have an out of date version of the cert8.db which I know is in home/.mozilla/default user directory.