I caught the "LOS software developer" fever from the community, and decided to complete a personal project that has been hanging unfinished for many years.
Here it is: https://github.com/TorZidan/LisaFileSystemTool/
I used elbow grease and AI to decode the LOS & Workshop file system format, by peeking into the LOS open source code, and via many trials and errors on many different disk image files.
Unlike previous attempts by others, everything is complete and well documented. Note: the "add file to a disk image" feature is experimental, works only with LOS 1.0 and 2.0 disk images, for now.
Section https://github.com/TorZidan/LisaFileSystemTool/#59-protected-files-theft-protection-and-removing-the-protection-deserialization (protected files) is particularly interesting.
Enjoy!