Adding a gimp plugin

[Anne Wilson]

Linux Format this month mentions a plugin that takes the largest possible crop 
after a rotate or perspective adjustment.  It's found at 
http://registry.gimp.org/plugin?id=7636

I see that there is a plugins subdirectory under ~/.gimp-2.2, but putting the 
python script there doesn't seem to make it available in any menu.  Where 
should it go?

Anne