Can Pencil+ 3 data be converted to Pencil+ 4?

Using the utility plugin "PSOFT Pencil+ 4 Converter", Pencil+ 3 data can be converted to Pencil+ 4.

PSOFT Pencil+ 4 Converter is a utility plugin used to convert materials created with Pencil+ 3 material / standard material to Pencil+ 4 materials, or to convert Pencil+ 3 Lines to Pencil+ 4 Lines.

Download the utility plugin here.