I'm trying to get the .jar file of MobMuPlat Editor to open in Widnows 10 64 bit so that I can see and use the layout editor. I think I should be able to double click the .jar file in this zip extracted file path:
I've tried installing Java, the JRE, the JDK, uninstalling and reinstalling, the .jar fix utility (the Google result for why .jar files won't open on Windows 10), and a few other things. I got it to open once before but I can't remember exactly how or figure out what I'm doing differently. What's odd is that I've gotten another .jar file to launch, one that changes the mode of an APC40 MIDI controller.