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AFLT will not compile

Hi all,
I turned off the update feature since the stuff4fs web site no longer exists. However, I cannot compile an airport. I can save the placement data, but when I go to the compiler screen, the bottom button is greyed out.
Please let me know how to solve this issue.
Thanks in advance,
Do you get a window like this?

Sorry for the slow response. Yes Guenther, I get that window, but the bottom button is grayed out. I have never had that issue before.
Sorry, I see no chance for further help without the files.
You could try another airport perhaps?
Is the 24 hour box checked? Is there a valid path in the text box? Have you chosen a light type? Does the sim you are compiling to have a valid Registry entry?