Install

1. Download the zip. Don't unzip it.
2. Blender → Edit → Preferences → Add-ons → Install from Disk → pick the zip.
3. Turn it on. The panel is in the 3D View sidebar (press N) → Baubles tab. You can also add one from Add → Mesh → New Bauble.

Make a bauble

Click New Bauble. With it selected, change any setting in Active Bauble: shape, size, ribs, colour, finish, pattern, glow and cap. It updates straight away.

Random sets

In Sets & Trees, pick a palette and count, then click Make Random Set. Each click gives a new set.

Hang on a tree

Select your tree mesh, set Gap, Offset and the From/To height, then click Hang on Tree.

Copy and randomise

Select several baubles, with the one to copy from active, and click Copy Look to Selected. The refresh button gives each selected bauble a new random look.

Web panel

Click Start Web Panel. It opens in your browser at http://127.0.0.1:8765. Every setting has a slider and a number box, plus tooltips. The preview is a real Blender render: choose EEVEE or Cycles, quality, angle and background. Click the X next to the button to stop it.

Exporting

Click Make Normal Mesh on selected baubles before exporting or sending the file to someone without the add-on.