Glass Viper download
Glass Viper
These are old zip files, and OSs don't trust them any more!
Just right-click or control-click the link  and 'Save As' or 'Save link as..'
To download.

Version 1.42
Apple MacOS 10.11+, 64 bit Intel & Arm.
To purchase
Unlock evaluation copy by buying a registration key from the shop.