You don't see approaches, it's because you are not using the AFCAD that comes with the scenery, because that one doesn't remove the default approaches.
But, if you edit it with ADE, the command "DeleteAllApproaches", that we set to "False" in our file, becomes "True" when saved back with ADE, even if you don't change anything else.
So, if you want to add your own modifications, or use an AFCAD made by someone else that has this issue, you need to enable the option in ADE to Save the XML code for the scenery, then compile it, edit the resulting XML, and fix the "DeleteAllApproaches" command from "True" to "False", then compile the XML with the bglcomp program that comes with the SDK.