SDK Latest version does not allow changing of properties

Thank you so much for your answer. I tried to delete as you said but it did not solve the problem, I make the changes on the project but probably it does not make the correct BUILD because it does not update the project with the change. I also see this in the .xml file in the project’s “data” directory.
This DevMod SDK seems crazy. I will wait for some updates, in the meantime I try to build a non-ASOBO new airport to see what happens.
I wouldn’t want it to depend on VISUAL STUDIO installation …
I would have to reinstall the SIM with the slow download of a snail (excuse me the snails).
Thanks again, if you have any other ideas I would be really happy.