I was going to post to saying "so you have to buy the mod again?" but then I started thinking. IPB v4 is a completely new coding, which means all the addons have to be re-written. So of course they should be entitled to charge you for getting the mod again, tho most modders either give you an discount for upgrading or let you do it for free. Either way I'm also still getting this mod once I upgrade my forum to v4!