I never though of right-clicking on an empty area of the Start11 menu. That works, but sure isn't intuitive. I was trying to start the configuration from the start menu all programs shortcut under Stardock/Start11 ("C:\Program Files (x86)\Stardock\Start11\Start11Config.exe"). Strange how only Stardock programs trigger Advanced Uninstaller Pro (and it's been going on for quite some time (despite system rebuilds)).
I'm still waiting to hear back from Innovative Solutions (Advanced Uninstaller Pro).
Thanks for your help. I'll keep you informed as to what I.S. has to say.