Installation:

1. Download the Add-on File

   • Get the latest .zip file of the add-on

2. Open Blender Preferences

   • Go to the top menu:
     Edit → Preferences → Add-ons

3. Install from File

   • Click “Install…” in the top-right corner of the Add-ons tab.

   • Locate and select the downloaded .zip file.

   • Click Install Add-on.

Access

Open Properties → Object Data, scroll to Multi-Shape Keys, and press Refresh to load the current keys
Filtering uses Blender’s built-in UIList search field.

All operations work on the active mesh object.