there are two 1.3.2 versions, the old one from 6th of December, and the updated one from the 17th that includes some localization updates.Yes, the 1.3.2 beta exists on Steam for opt-in rollbacks. Restart Steam if you're not seeing it in the dropdown (there's no password).
For GOG disable automatic updates and you can opt-in to any specific previous release (no need for betas).
the one on steam is the one from the 6th of december, the one i am asking about is from the 17th, rolling back to the older 1.3.2 just gives me broken mission templates in my current modded playtrough, hence my asking foir the 17th one.