How can I update Speedify on Linux?

If you installed using the get speedily script, then the Speedify repository has been added to your list of Package Sources. This means that when you use an "apt" based command to update the packages on your machine, Speedify will be automatically updated as well.

To update all the applications on your machine, including Speedify:

sudo apt update
sudo apt upgrade

Alternatively to just update Speedify, if you installed the user interface run:

sudo apt update 
sudo apt upgrade speedifyui

If you are running without the user interface run:

sudo apt update
sudo apt upgrade speedify

In any case, that should be it. "update" checks for new versions and the "upgrade" actually installs them. Speedify will automatically start the new version of the daemon once the update is complete.