Here's the TL;DR:
They named everything through v0.89.8 as "Seasons 1-4" in July of 2023. They stated at that time they were going to break those up into season at some point down the line. (Basically, from what I can tell - its primarily because of Uberpie's inability to figure out saves continuing over different releases AND that the size of the game - in GB - was getting too much and they didn't want to keep adding to the size)
They got kicked off Patreon in March of 2024 (for violating policies regarding content, for years even after having to revamp Family Tales/Taffy Tales in 2018 and saying they would not violate policies further). At that time, they decided it was time to break apart into Seasons to sell as retail versions on Steam. The first - "Season 1 Redux" - was revised, revisited, and revamped the User Interface and other aspects while also using AI for the art modeled upon Uberpie's previous artwork.
Steam did not accept their submission in January of 2025 due to the "gray area" of the school (college) setting with younger looking characters. And so they are now selling "Season 1 Redux" on itch.io. They also recently created a censored version that is for sale on DLsite.