pull down to refresh

Hi Fran. Thank you for reaching out.
I installed the software on Linux, first following the command on the website, and then made it executable. However, each time I tried to launch it, it gave an error "No command found"
I still followed the steps on GitHub and encountered the same issue. So I'm not sure what I haven't done right.
Could you please help? Perhaps you can point me to a detailed documentation or something.
Thank you.