User SilicaAndPina on the exetools forum had shared a tool they created to decrypt minecraft marketplace content in this thread. The forum is private so I can’t download it, however I believe that a user later shared the tool on the r/piracy reddit group (specifically, this post) but the reddit group is locked so I also can’t see that post hahah. If someone has the tool and wouldn’t mind sharing it I’d be very appreciative!