I had to delete each individual voice.
You can select multiple presets.
On windows if you use Shift + Click on a second preset, and then the presets between the first and the second preset are all selected, and can be deleted at the same time.
If you use Control + Click, then you select each preset you click on in no particular order or place, and delete only the selected presets.
I assume you can do similar on a MAC. In Windows it's a standard workmethod.
But deleting banks should work.
BTW: One thing that's annoy me is, Piano V2 have overtaken my user presets from Piano V. Piano V no longer have my old Piano V user presets. The presets don't show up in Piano V, but only in Piano V2 evem if the presets are still inside the old Piano Vs preset folder.
And in Piano V2 the settings like EQ setings for the old Piano V presets can't be seen. I don't even think they sound the same.
Arturia - It should be possible to use old Piano V user presets in Piano V, no matter one have Piano V2.
Also when old Piano V presets are used in Piano V2, then all the parameter settings should be shown. I know for example the EQ now has more bands than before, but can't that be translated?
EDIT: I was wondering if the commercial preset pack need to be uninstalled?
Don't know if it was installed and required activation of some sort.
Perhaps that make a difference?
Have you tried to create your own user bank and delete that? EDIT END