With Construct 3's native support for Spacing-data, there's no need to use SprintFont+ anymore, or have it migrated to C3. The following tutorial will outline h...
Tool to convert spacing data from C2 to C3 format:
dropbox.com/scl/fi/jrpe98rwan0576zvy1sf9/SpriteFont_convert_spacingdata.capx
Thanks!