It's not our fault. Nobody asks about your vis license. Mp3 is extremely unstable in the current build and will crash.
In Visionaire 4.2 it works without problems, with Visionaire 4.2.5 it crashes
Why you don't remove the mp3 "support"? If there is a licence problem and a technical problem, then it is inevitable to remove the mp3 "support" completely from visionaire.