Great plugin - but it looks like the roles used for the "minimum admin access" setting are hard-coded to the WordPress defaults (Author, Editor etc).
If you use this plugin with Capabilities Manager, then you can create custom roles... but they don't show up in the UAM settings page dropdown. I have modified the plugin code to make it work, but obviously it would be great if UAM would query the WP db to pull back all the existing roles (just like WP itself does on the "New User" screen). Alternatively, if it used a capability to decide (versus just matching the User's role)
Would be great to see this make it into the next release - keep up the good work!