Indie game storeFree gamesFun gamesHorror games
Game developmentAssetsComics
SalesBundles
Jobs

The 'extra' version is not able to be installed/managed via the itchio desktop application; please fix this issue.

Oh, I don't have that app myself so I wasn't aware! Thanks for bringing it to my attention. :) Do you know why it might be, though?

There is a useful guide for itchio creators that should help you out.