This was on the web version.
I saved my game file, went to the main menu, made a file backup, and attempted to reopen the game. I got stuck on "attempting to restore backup." I then imported my backup, and my colony is now a two-man colony with no buildings, but with all of my resources banked before the save.
Apparently my old colony still exists.
Building, population, and research progress removed
#1 2020-05-30 18:25:48