Well, 1.4.3 was mostly related to modding / steam workshop stuff. 1.4.4 and 1.4.5 were internal testing versions, and 1.4.6 was a fairly minor bug... so it never really got built for itch. If there is ever another build, I'm sure I'll post it to both Itch and Steam, but it's a bit of a challenge to build now that it's several engine versions behind.
If anyone has the itch version and are interested in the update or using the steam workshop, DM me and I will send you a steam key. I know that's not a perfect fit for everyone, but maybe it's a helpful option!