I just went to "JoomSEF - Upgrade Manager" and for some reason it showed that I did NOT have the paid version. I hit the migration button...and everything is working again.

I have also just started getting "Joomla SEF URLs by Artio" message recently... and I have had the "Paid Version" for quite some time. I checked all of my setting and everything looks correct. Please explain how to remove...thanks!