I’vedownloaded these older versions you mentioned. In 2.83 the addon wont show after install. 2.92 gives the “Upgrade to 2.8x required” warning.
I tried the mtree 2.83 branch as well but same warning.
However, i got the harvester version to work somehow but that version seems incomplete (like no leave creation).
I think i wait for the official version for 2.93