For example, you see the pilots while in cockpit view, the switches are not clickable or you get this error message:
This is related to a corrupted installation. To fix this please follow the procedure stated in the following FAQ: http://www.simcoders.com/faqs/i-get-the-invalid-product-licence-error/
← On a Mac, I get an error message or the switches are not working
On a Mac, I get an error message or the switches are not working