You do realize that following your own argument he could put up a GitHub issues page and say he only supports Windows and drop everything Linux related.
Indeed. If he changed the license to allow packaging the new version, at least all of those reports would be of the current version rather than the last GPL one.
Let the community in and use their time to contribute rather than locking it down as a one man project and then complaining about it.
You do realize that following your own argument he could put up a GitHub issues page and say he only supports Windows and drop everything Linux related.
Indeed. If he changed the license to allow packaging the new version, at least all of those reports would be of the current version rather than the last GPL one.
Let the community in and use their time to contribute rather than locking it down as a one man project and then complaining about it.