I watched the first video on the page and it looks like there are 4 install options, but you need to select from inside your alby web account to get access. I have no clue, lmk if you make it work 🧡 

 It's not in the official app store yet, try this: https://guides.getalby.com/user-guide/v/alby-account-and-browser-extension/alby-hub/running/umbrel-start9-etc. 

 Can you provide a link to the file to sideload please? thank you.