NAVIGATION
Here you see a list of all your Google+ Buttons.
Each with its name and the according Replacement-Tag to use within your template or in your articles.
→ When you added a plugin you can just click on the Replacement Tag shown in the listing and Copy+Paste the RT to wherever you want the plugin to appear on your site.
At the moment these Google+ Plugins are available:
Note: Deleting a plugin here does not automatically delete the Replacement Tags you added to your site (most likely to your template). The RT's are not rendered anymore when a plugin is deleted. The entries in the Facebook sites of the users will remain though!
Same thing happens when you disable a Like Plugin here. It will not be rendered anymore on your website, but still remain in the Google+ sites of the users who liked your pages.