An mj file extension is related to the MovieJack DVD ripper and used for its ripper data.
MJ file extension - MovieJack DVD ripper data
What is mj file? How to open mj files?
File type specification:
The mj file extension is associated with MovieJack DVD ripper, a software for Microsoft Windows operating system that allows users to copy DVD-video disks.
The mj file stores some kind of data used by MovieJack.
The MovieJack is obsolete product.
This mj file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.