Installation

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

Usage

1. Open the Toilets tab in the 3D viewport sidebar (N). With nothing selected, click the picture to choose one of the 51 designs and add it at the 3D cursor, or use Shift+A, Mesh, Public Toilet.
2. Select the toilet to edit it. The tabs hold every setting: Toilet (kind, size, row, doors, roof, base), Inside, Sign, Look, Age and Export.
3. Surprise makes a new random toilet, Vary changes the current one, and the color and age buttons pick a new color scheme or condition.
4. Mesh Copy makes a plain mesh for export or hand editing.