I'm back. This time with a small glitch but a crash all the same. When deleting the Amplitube LE plug-in while playback is underway, the program crashes. Strangely, this only happens when the 'Tuner' function of Amplitube is till running when I delete the plug-in from the rack. Any other configuration does not cause the same problem. As I say, a small issue given that I know what NOT to do to avoid it crashing but one day I'll forget...

This type of issue is difficult to assess as it may be a problem with the behavior or the 3rd party Amplitube VST plugin itself as opposed to an actual bug that Mixmeister is able to address. If you are not having problems with any of your other plugins, particularly the ones that come bundled with Fusion, then you may need to address this issue to the plugin provider. Depending on the software version of their plugin that you have, there may also be an updated release.