Yes, I have the feeling that it is no longer supported. I had already written directly to Blueglass (in Switzerland), it took a while and I got an answer… since I wrote it in German, I quote it here in German:
“Wir möchten darauf hinweisen, dass das Plugin kostenlos & open source ist. Es darf somit frei verwendet werden, jedoch besteht durch die reine Verwendung kein Anspruch auf Support.
Natürlich können wir bei Bedarf Support bieten und/oder individuelle Erweiterungen/Anpassungen realisieren. Dementsprechend würden wir dann den Aufwand in einem ersten Schritt kommunizieren und diesen dann anschliessend verrechnen.”
Now I’m testing another plugin
Hello, I noticed that too. It would be good if the mail was not sent at all if an incorrect format was uploaded as an attachment, or if an incorrect format could not be uploaded in the first place. But unfortunately the mail is sent, albeit without the attachment with the wrong file extension. But the applicant then thinks that all the files have arrived.
Best regards, Michael