This specific sub-patch (v1.11.12) was primarily for stability and balance:
: Adjusted the calculation for refitting ships and tanks to be a percentage of the hull cost. hearts-of-iron-iv-v1-11-12-0xdeadc0de-zip
: Ensure your DLC folders match the 1.11.12 era. Newer DLCs released after this version (like By Blood Alone or Arms Against Tyranny ) may need to be disabled to prevent crashes. This specific sub-patch (v1