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Not currently, no. Under Manage/Preferences you can change the view to show all of the categories with or without the "Simple Grouping"/"Family" but the Simple Groupings and Families are fixed.
Added: You can hide empty groups in the Navigation Pane Options (F6) menu.
Last edited by Parody; April 29th, 2014 at 02:26 PM.
Reason: It's the only Preference!
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