OK, that’s a toolbar button which goes to a specific folder (via the IDL version of the path). It isn’t a favorite.
Remove the whole
IDL:?AAA...== string and change the Function line to this instead:
Or, if you want your Favorites list there on the toolbar, add a button which runs this, then add any folders you want to the favorites list, and clean up any old buttons which did things the other way:
Favorites SHOWICONS USEQUALKEYS NOOPENINTABS