I have a release already made for when I initially released a mod ( https://gamebanana.com/mods/515164 ), and I have since added two BMD files I changed. I don't know how to package the changes into a new release, however.
What I have done so far is unpacked the 7z on the mod page, added in the two files I edited, and then used Reloaded-II to update the version number to 1.0.1. I don't know how to properly release this as an update though. Do I publish via Reloaded-II to get my new release files and then just replace the files currently up on Gamebanana?