For KSP 1.12.2.
Adds support for various new RP-1 features, like Experimental Parts (you can now design beyond your current techlevel, you just can't tool it) and Unlock Credits (techlevel unlocking is now done through PartUpgrades).
The PartUpgrades change means this is a mildly save-breaking update: any SPE Family techlevels you've unlocked will now be locked again, losing the funds you paid for NRE originally; but at least the ECMs (which are usually the bulk of the cost) stay unlocked.