I am still running WordPress 3.3.1 and this plugin works nicely. Very fast and, this far, very reliable. Thanks for all the work creating this plugin. Are you planning on supporting it in the future or it is being left to wither on the vine?
WordPress.org currently has it flagged with:
"This plugin hasn't been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress."