@AvikB, could you make mb version list on add-on submitting page customizable by Steven. at the moment, there is only mb version "3" available. it's completely insufficient info for users. there must be at least minor mb versions: 3.1, 3.2, 3.3, 3.4, etc. new mb versions will be available later, that's why the list of mb versions must be customizable by admin.