I was unaware about the current version I'm using, but I noticed today it's SpaceFM 1.0.6. Hey, wasn't it frozen/abandoned on 1.0.5???
So went to github and guess what... IgnorantGuru is still quietly taking some care of his creature. Released two months ago. but yeah. It's there. 8)
https://github.com/IgnorantGuru/spacefm/releases
I noticed that the other day, too.
I didn't check to see if it was the same development team.
IgnorantGuru handed over the maintainer keys to Mateusz Łukasik (https://qa.debian.org/developer.php?login=mati75%40linuxmint.pl) sometime ago.. It was all on IG's blog at one time.. Mateusz Łukasik had been silently maintaining it for almost a year (or more) while IG was on his hiatus