Saving a preset:

'Save Preset' (S in the menu) saves the current directory assignments
and the current playlist to the active preset.

'New Preset' (N in the menu) creates a new preset with the current assignments.
You are prompted for a name.

'Save Preset as' saves a copy of the preset under a new name.

'Delete Preset' (D in the menu) permanently deletes the selected preset.

'Rename preset' renames the selected preset.

Categories:
Presets can be organised in categories (folders in the tree).
'New category' creates a new category.
'New sub category' creates a nested category.
Presets can be moved between categories by drag and drop.

Unsaved changes:
When directory assignments have been changed, the status indicator shows 'P|'
at the right edge of the status bar. On closing the program, you are asked whether
to save the preset.
