Replace the two files with the similar named files in Blender 2.80 and restart Blender.
tin2tin/blender_fade_operator
Fade python operator for Blender swap the two files with the similar named files in Blender 2.80 and restart it.
Python
Fade python operator for Blender swap the two files with the similar named files in Blender 2.80 and restart it.
Python