Installation

In Blender open Edit, Preferences, Get Extensions, then use Install from Disk and pick the zip.

Usage

1. Open the Alien tab in the 3D viewport sidebar (N).
2. Click the big picture to choose a family and design, then Add.
3. With the plant selected, change it in the tabs: Body, Leaves, Stalks, Heads, Extras, Colors & Surface, Colony & Ground.
4. Surprise and Vary make new variations from the current one; Reset to Design goes back.
5. In Parts & Export choose a detail level, then Export for Games (GLB, glTF, FBX or OBJ with optional LODs), Photo Studio, or Convert to Mesh.