Hi Enug!

If you're on Windows 10, you should be able to set the file association in the Preferences of Windows. Open the "Preferences", go to "Apps". Click on "Standard Apps", scroll down and click on the entry "Choose Standard-Apps by filetype" (or so). Then a list of all available filename-extensions should appear. Scroll it down until you find the one you need. Then click on the icon on the right side of it and choose ARV from the list, if it is listed there.

I don't know any other opportunity to do this, except the ones from the context menu ("Open with..." and "Properties" > "Open with..."). I think it will also be possible to do it in the registry, but I wouldn't do that.