While everybody's waiting for the mod to get patched, a reminder: even with the Steam, you should be able to revert to the old version.
Go to your steam games folder and find the CK2 folder (\steam\steamapps\common\crusader kings ii\ unless you moved the folder), right click on it, choose "restore previous versions", choose one from the list before the patch was applied and click restore.
After that you can make a copy of that folder and let Steam keep autoupdating the actual folder as much as it likes.
I can't get that to work...