well, for now if we upload resource and update resource.. we will able to download or view only last resource so it's not so good. so there should be feature to see old updates too. 1. Each Updates Of resource will create separate new resource with thread 2. On resource page.. there should be changelog to old updates if we are on new resource page and if we are on old resource page .. then there we can see changelog for latest update and more old. 3. if we are on old resource page .. then a red notification will alert that a new version of product is avlaible.