By the way, this tool creates a project from the default airport , so you can load into the project editor and made changes
(And the whole fsdeveloper forum is very SDK active!)
You can also try the in SIM tool to import data from default airports, you can find it in the scenery editor (you need to start a clean airport project first)
![se_viewmenu_6_importapx (1)|520x377]
(upload://dsoBvQXXLNwqdhdjfzm8jqU4Hu2.jpeg)
In any case, you can’t play with the default buildings, you can only remove them, cause they are mostly auto-generated
Hope that helps!