The MPK Mini Plus editor can be downloaded from the MPK Mini Plus Software Manager.
When in the Software Manager, locate the settings cog wheel on the top left of the page:
When in the Software Manager, locate the settings cog wheel on the top left of the page:
In the MPK Mini Software Manager Preferences, select "Show Advanced Software"
Now, close the Software Manager Preferences to return to the main menu. You should see "MPK Mini Plus Program Editor":