Just FYI, I just found out that they have added a lot of new lines to the original multiplemodeldesc.xml, partcombinationdesc.xml and partcutdesc.xml files.
So I had to release a new update, with those new original files:
v1.8c
Critical update: All the versions before that were missing some key lines in the original parts of the .xml files.
If you have your own customized xml file, use the xml files provided in this version, and do your changes all over again, because the part that contains the original xml file has changed drastically and can make a lot of armors and weapons don't show up properly if you don't have those lines.
Download here