This is a list of links to helpful product documentations:

Avastar 3 (for Blender 3.1)

Avastar 3.0

Avastar 2.93 (for Blender 2.9)

Avastar 2.93

Avastar 2.79 (for Blender 2.79)

Avastar 2.79

Avastar-1 (legacy)

Avastar 1

Sparkles

Sparkles

Primstar

Primstar

Blender documentation/Download:

Blender Website