Hi,
This is more an idea than a question but - well there it is: I would REALLY like to delete deprecated extensions in order not to accidentally install them. As an example may serve dmxcalendar2 and dmxcalendar3. But there are a lot more of outdated extensions which even show up if a newer one has been installed.

Is there a way to at least make them disappear from the list? Even a manual disabling checkbox would be better than the way how it is now.

Hello Greta,
The latest version is the actual one.
You still see some old versions, because there are people still using them and we have not disabled access to them as they paid for the extensions.