Thanks, yes. Not sure about how itch io manages the devlog, but for the simplicity of things, I hide the old versions not to confuse people. As of removals, no big things were removed but indeed lots of renaming and refinement. Most of the changes went in the direction of "evoking" ideas on the player, where older versions were more frontal, for example what now is "Room for hidden things or intentions", before it was "Perception test". I like the newer more because it opens to more different interpretations, where the old one forced the PCs to do something in a specific way.
The most different release of all, was version 3.x, which coincidentally, is the one implemented online, here: https://perchance.org/plot-unfolding-machine
Version 3 did everything quite differently, in a sense that it helped players "build sentences". But it forced you to roll many more times to complete those sentences. Works well if automated, but not so much on paper.