I don't know if this is a bug in MirPro or a bug in StudioOne 4.5, so let me ask here and see where it gets, I'll report it to PreSonus if that makes sense.
Basically if I use the VST/AU version of MirPro inside StudioOne..it all works fine. However, if I put an instance of the plugin on a track..and then later remove that plugin or even delete the track...the icon is still present in the MirPro main stage window. If I do that a few times, pretty soon I have a whole bunch of orphaned instrument icons on stage.
I am new to StudioOne, but I can't find any other references to these removed instances of MirPro, but obviously something is hanging on to that connection somewhere in studio one I think... but does anyone have any knowledge or ideas about this?