Is the license answer valid also for extensions?
Consider I have the free version of Ario JoomSEF on joomla 1.5.
After upgrading it to version 3, I noticed that the Phoca Gallery extension doesn't work anymore because it has become licensed.
If I buy the Phoca Gallery extension (10 $) for JoomSEF 3, do I have to pay again for the same extension when I'll move to Joomla 2.5 and I'll install JoomSEF (free edition) 4?

Thank you for your answer.

kind regards
Lorenzo