hi,
first of all, I can suggest to upgrade to Wing 5.5 that is quite great.
As I understand, you did the upgrade from a previous version Wing 4 ? did you follow the migration path suggested on the release note (did you have it ?), might be the reason why https doesn't work (don't try http; it's only https)
the migration utility is inside the software package (Software / Configuration Migration Tool) and works on Windows (.bat to run) and works pretty much, even if I suggest to make a brand new and clean config, especially if you have only one AP !
romain