The first file uploaded to Reviews' becomes v.1. Any files after, it follows in numerical order i.e. v.2, v.3, and so on under that same title.
If the changes are minor, you may also upload within a version.
Ex. V.3A, V.3B, V.3C
When multiple files are uploaded at once at the very first screen of the 'Reviews', then they're each created as a Review file.