I updated the otherd day and discoverd this new menu item.
it looks like something is missing in the language settings hence the + and _ parts
Clicking it gives me a new page with all your plugins that are available in the store.
However clicking on these items takes me to a blank screen.
Just thought I would let you know incase I have managed to get a hold of something that is still in development and not meant for relase yet.
Cheers
Shaun.