I want to change 45J to KRCZ in FSX. One way I really thought would work would be to rename the identifier to KRCZ and use it as if it were a new airport, then just move the default 45J to the south pacific or the middle of siberia or northern nunavut. But for some reason when I attempt to do that, it puts two airports on top of each other, both my add-on KRCZ and the default 45J. Did I miss something here? Why wont 45J go away?