I have about 40 or so addons I purchased for blender. Every single one of them except grouppro requires you to manually update by going to gumroad or wherever you got it from and check if there is a new version and manually download/delete/reinstall.
Group pro on the other hand has check update and update built into the addon browser, it’s two clicks and I have the latest version up and running. Why is this not standard with all add ons? Is there a technical reason? It would be a huge relief not having to waste half a day reinstalling addons everytime I update blender.