I have 2 suggestions I'd like to propose.
1. An option to auto hide the categories when moving between categories.
2. User chosen folders instead of Music Documents etc.
New: r3dfox (July 15, 2025), Platform 30.0.4 (July 15, 2025)
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Both are planned for an upcoming release: See the "Upcoming Features" section here: https://portableapps.com/node/28593