Hi there,

First you need to tell MM 15 Premium where to find the VST plug-ins on your hard drive: Open the program, bring up the settings (e.g. by pressing "Y") and switch to the "Folders" tab. Here you will find a button to add your VST plug-in path. Browse to the correct location on your disc and Music Maker will scan the plug-in files it can use. Now your new VST instruments will show up in the program's "Synthesizer" section under the track synthesizers (or in the instrument drop-down list of the MIDI Editor). The new VST effects will be available in the FX insert slots of the mixer window.

I hope this helps!