A couple of people reported this problem, and I'd like to try to get and share some more information on it. I cannot reproduce the problem myself. The content of the file in question did not change with this release (but the line endings in the file might have changed).

In a standard Steam install on Windows, the file in question can be found here:
C:\Program Files (x86)\Steam\steamapps\workshop\content\294100\735106432\Defs\MapGeneratorDefs\MapGenerators.xml

The expected contents of the file can be seen here:
https://github.com/edbmods/EdBPrepareCarefully/blob/v1.0.12/Resources/Defs/MapGeneratorDefs/MapGenerators.xml

Maybe something went wrong with updating that file? Try to unsubscribe/subscribe to the mod again to trigger a re-download?

Are you running on Windows or another OS? 32-bit or 64-bit?