Thanks @cbratschi , thats sounds great!
You can create your fork and publish it as a plugin here https://www.ads-software.com/plugins/add
According to WordPress Developers guidelines plugin forks are allowed, so, it should be approved.
If the reviewer suggests any copyright issues you can send this comment as proof of our consent.
In this way all those like @jpnl and @rghedin who want to preserve the plugin in its previous state will be able to do so.
Best regards