Here is how you can switch between characters:
1. You need a "Creator" license from https://patreon.com/meshedvr
2. Look at this tutorial https://youtu.be/6MZVloDZMd8 on how to use Looks
3. Download your favorite character from "Looks" section on the hub or from any other source.
4. Switch to Edit Mode
5. Click on tab "Appearance Presets". Click on "Select Existing". You can click on "All flatterned" to see all available presets. In the dialog box choose desired preset.
6. May happen that your downloaded look doesn't contain a preset. In that case you have to open the scene with the look and create the preset manually (see the tutorial above)
7. Select your character in the VaM scene and click on tab "Control & Physics 1". On this tab set "Scale" to 1.