See Snippet 13 on my site.
This is a long outstanding annoyance so please submit a feature request asking Adobe to allow warnings to be turned on and off without having to edit the registry.
The more people who report a bug or request a feature, the more likely it is to be actioned. Please follow this link.
See www.grainge.org for RoboHelp and Authoring tips
See if the link below helps you sort things.
I think number 13 is what you are looking for.
Helpful and Handy Links
Thanks! As an FYI, I am working on Vista, so my settings were a bit different. I ran the regedit.exe, then had to go here:
Once there, I deleted the appropriate key (it was something like, "Dont show outside project") and the notifications began popping up again. Thanks so much for your help - I did submit that request for a new feature as you requested.