When I Update Minecraft to a new version or the beta and unenroll from the beta. I have to reinstall all my content I have.

When I Update Minecraft to a new version or the beta and unenroll from the beta. I have to reinstall all my content I have. It annoys me that I have to reinstall all my Mash Up Packs, Texture Packs and Maps I have. It bugs me so much, and I hate having to do this every single time.