In reply to carl.

Hi Carl

In many cases, you can download older plugin versions directly from the plugins page in the WordPress repository. In this case, visit https://wordpress.org/plugins/wp-user-avatar/advanced/ and scroll to the bottom to download an older plugin version.

Also, it's perfectly okay and legal to create a GitHub repo with a copy of any plugin from the WordPress repository (those plugins are all licensed under the GPL).

Me, and several other people here, already did that, so you can just use one of those repositories instead of creating another one 😉

https://github.com/stracker-phil/orig-user-avatar (mine)
https://github.com/dartiss/custom-user-avatar (David Artiss)
https://github.com/onedesigns/one-user-avatar (Daniel Tara)