First of all it's a great plugin, so massive thanks for it.
My only comment is the way it restricts editting snippets. While you limit this feature to administrative users only it should be also allowed for Editors.
I can see you're using
if ( current_user_can('manage_options') ), which is all fine but by definition Editors should be capable of editting others' content. Snippets are not options.
Do you think it could be corrected, or perhaps customisable somewhere?