Check attached screenshots with guide
Installation:
Just drop .var file to Addon Packages folder.
Opening:
Open any scene from the main screen.
1. Click "Toggle UI".
2. Switch to "Edit Mode".
3. Click on "Appearance Preset" tab.
4. Click on "Select Existing" tab.
5. Scroll down the menu on the left till you see "BoyToy...." tab.
6. Select model and open.