There has been a recent change to how App Mart lists Centrafuse apps (plugins). Instead of 1 category for both Centrafuse v.2 and Centrafuse v.3, there are now individual categories for both. Please update your apps with the proper version. Simply log into the backend, edit your app and check the proper category to the left of the screen. Doing this will make sure your app is properly displayed/removed in the upcoming App Mart plugin.