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The same has been raised for Roboform, Ad Muncher (just off the top of my head). 
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Please don't lump Ad Muncher in with RoboForm.

Ad Muncher honored (lifetime versions and support) and grandfathered in all their users assuming you had purchased before their license term change (October 8th 2006).

I say this because I own several Ad Muncher lifetime licenses. I have always been impressed with their support and timely updates/fixes. You can still purchases a lifetime license but the price has substantially increased.

Now Roboform on the other hand.. shame on them! 'nuff said.