Before I was proficient enough to use Labels, I created various Palettes in the Highlighting tool, and stored highlighted text of various pallet styles of the AFAT resource into palette-specific Note files. Once I realized the usefulness of labels, I edited the pallet styles in use and added labels to each of the pallet styles.

However, the highlighted text already stored in various note files did not "inherit" the labels, thus the pallet-specific notes files created do not automatically update with these newly added labels. New notes have the label attached as expected, but the existing notes do not. It seems as though I would have to anually add a label to each note in the notes files to attach the label to the highlighted text in AFAT, as I show below for the first instance.

I thought perhaps re-styling would work, but it seemed only to re-style the visual aspects, as labels seem to be considered a different kind of entity.
Does anyone know of a way to batch change all the previous highlights to incorporate the new pallet style labels?
Thanks to everyone in advance.