Using MIDI Designer Lite Unlocked | Version 1.7.1 | Build 1714 on iPad Air (original model)
I tap Load Layout.
I can see many saved layouts.
I scroll to one and tap it.
Then, tap the < arrow at the top of the box.
Regards, Dave.
The layout doesn't change.
Using "Mail Layout" also confirms that the loaded layout is still the latest one, not the layout I tried to load.