Installation

1. Download the gpOutliner-<version>.zip file from your source of purchase (or from Blender Extensions — gpOutliner is free).
2. Drag and drop the .zip anywhere into Blender's window — or, from Edit > Preferences > Get Extensions (Add-ons on some versions), use the ▾ menu > Install from Disk... and select the file.

Reinstalling a newer .zip cleanly replaces the previous version — no duplicate, no manual removal needed.

Requires Blender 5.2 or newer.

Button or panel not showing up right after installation?

On a Blender profile that has never had the add-on installed before, some UI elements can occasionally fail to appear immediately after installation. Disable then re-enable the add-on once (in Preferences > Get Extensions) — no reinstall needed.