I don't think this is available for Jaguar, nor released in 2018. Most likely this is the zip from a thread on atariage.com from 2018, where they talk about Jaytrax music that was used in a Jaguar game - but as audio. The developers stopped working on Jaytrax in 2002/2003 and renamed it to Syntrax which they developed until 2004 afaik. https://forums.atariage.com/topic/281157-jaytraxgreat-synthesizer-mod-tracker-sort-of-jaguar-related-sort-of/