Sketchup to Blender add-on once installed, is not showing.

[Space1Horror1]

Sketchup to Blender 3,5 add-on is there but not showing up in the Import/Export windows.
I really need it to work.
The only other method I can utilize is a plug-in on Sketchup like I do for Muvizu.
But, I am only using Sketchup v8 the free version, that's why I need the add-on for blender.
I downloaded the py file which worked but also supposed to have the top main add-on but don't understand how it works.
Should I log in from the reference window to Git Hub?? Not sure, else it doesn't work either.