Hello! There's a part of an old urban legend here. Eddie's source code is available on GitHub (including the current 2.22.2 which is still considered "beta", according to the unorthodox release cycle of Eddie), anyway the essence of the urban legend is assuming that a license enforces restrictions on future releases of a certain work on the copyright holders themselves.
The copyright holders are not restricted on future development or re-arrangement of a work of mind by any previous license since they are the "legal owners" (according to the international treaties which overlap intellectual monopoly with intellectual property and the EU legal framework on intellectual monopolies). On subsequent releases, the license of the current work always defines and/or restricts the rights of third parties, and not the rights of the legal owners. At the same time, the license we agreed to pick grants third parties that no retroactive restrictions are possible.
If Eddie's developer decided to distribute an Eddie version without source code he would have the legal right to do so, provided that Eddie does not include third-party code licensed with restrictions against closed source code. It doesn't happen because of AirVPN mission (and Eddie's developer is also an AirVPN co-founder), but legally it would be Eddie's developer right.
An identical right is reserved to AirVPN Suite developers, and exercised on both senses. If you notice, when a Suite alpha or beta version is made available to community testers, the OpenVPN3-AirVPN library against which the Suite is linked is always open source, while the proprietary preview code is closed. It is then re-licensed and opened (usually under GPLv3 but we're not ruling out different, more permissive licenses, for the parts we have exclusive rights on) only when the development team considers the software as "stable". Even in this case, releasing a copyrighted software as a preview does not prevent the developers to re-license and open it in the future (so far to make it open source under GPL).
You did not miss anything. Eddie 2.22.2 is still the latest "experimental", but the testing work is over. If nothing serious comes out (fingers crossed) you will see a new stable release very soon.
Kind regards