Problem has been notified and moved to the dev.

Not Herman but having the same issue, using the same email for purchases on Simmarket,  store.flightsim.com, Orbx and Aerosoft. None of the ABCDE-1234-12345-12345-12345, A1234B-ABCDEF1Z-ABCDEFG work.

It's very nice indeed. I like these exploration type of add-ons, "going" to places you probably never see.  One minor issue is some pop-in at the base airfield on a few objects, hopefully this will be fixed.

Possibly because that's literally the meaning of the word "schedule" according to most dictionaries? (e.g. in the Cambridge Dictionary: "a list of planned activities or things to be done showing the times or dates when they are intended to happen or be done")    I guess we're talking about a schedule in the context of project management software then, which would probably work with arbitrary "currencies" (like person-hours), idk, I haven't used that kind of software in decades... in this context, I'm just a "resource".   But then, what does being "fully on schedule" (quoting Mathijs) actually mean? If a project timeline is set up without dates, the only meaning I can think of is "a project is executed in a way that no resource is idle because it has to wait for dependencies". Which, in itself, is a feat.  

His name is also Herman  but i changed it to his forum name