If the below message is displayed and Smart Viewer closes unexpectedly, it may be because Smart Viewer was updated from a previous version implementing new user fields. Only the administrator account can be used.
If this happens and other than administration users need to be added, unfortunately the only way to add this capability is to uninstall the software and install a new version of it.
After reinstalling the software, a new drop-down will be visible. " Password change period", Not used
This would indicate than new users cane be added
Below: New Options setup page 4.97
Below: Before 4.97
Additional information is in the attached manuals