Installation

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

Usage

1. Open the sidebar (N) in the 3D Viewport and pick the Tree tab.
2. Click the picture to choose a design and press Add Tree, or press Surprise Me.
3. With the tree selected, change Season, Condition, Crown Shape, Foliage and Leaf Colors; the tree rebuilds live.
4. Fine-tune the crown and branches, trunk and roots (bark, moss, ivy), leaves, fruit and flowers, colors and snow in the sub-panels.
5. Surprise gives a random tree, Vary reshapes the same design, Colors picks a new leaf palette.
6. Actions > Make Plain Mesh keeps the tree as a normal mesh for hand editing.