I made an app to convert the MsgPack files in the boundless game dir to human-readable indented JSON. I’ve put it on github here and made a release with a compiled version that anyone can download.
-i, --input Required. Specifies the input directory or MsgPack file to read. -o, --output Required. Specifies the output directory to write json file(s). --help Display this help screen. --version Display version information.