The Visio add-in that comes with the YaSM Process Map is provided with a certificate. In some cases, this certificate must be installed prior to setting up the add-in, so that Windows does not block the execution of the setup program.
Security certificates of this type expire at some point in time, so when trying to install the certificate you may see the following message:
If this happens, please get back to us or raise a support ticket. We will then send you new setup files with an updated certificate.
Stefan (YaSM community moderator)