Editing Airports/ Adding buildings

whenever I add buildings to a airport that has no buildings in developer mode and I click save project then exit the project screens the buildings disappear? any help?

You need to move the contents of your output\Packages folder into the sim’s Community folder.

It gives me this error where it says are you sure you want to move this file to where is doesnt support Encryption? what should i click?

im not sure if im looking at the right thing where is this output/Packages foler?

It may not be called ‘output’, as I think you get to choose where the scenery is output when you create the project. However I think the ‘packages’ folder is created there. So there’ll be a folder named for your project, and it’s that folder that goes into the Community folder.