You can download the scripts at the following address: https://free-astro.org/index.php?title=Siril:scripts
Installation from sources
Siril’s sources are available via git here https://gitlab.com/free-astro/siril/
But keep in mind that using the development version of Siril can be risky in the sense that it may become unstable at some point.
There is a beta version of the upcoming 1.0 version, called 0.99.4. If you are adventurous., or just curious you can test it here. But keep in mind that is a beta version.
Choose your OS
Click below on your operating system’s icon to download Siril