New version out, Snouz added some more techs to unlock the units, but you'll need to research the droid units again to get the recipes. This is from a migration file, perhaps it would have been better not to have done this.. but hey, it shouldn't take long! and will help reinforce what/when you should have certain units. 
Date: 2021.10.23
  Changes:
    - (snouz)
    - 9 new technologies
    - Buildings visual adjustments (combinators, loot chest, patrol pole).
    - New building icons.
    - Sorted recipe/item order.
    - Description improvements.
    - (kyranzor)
    - fixing issue #173
    - adjusting migration for 0.4.12 to consume less RAM again.