Thanks. You are using the free Version 2.1 for Testimonial. This plugin is developed by Chinmoy Paul.

You will get the all details from http://www.marketingadsandseo.com/2010/12/testimonials-plugin-for-wordpress-site/. Only for $24.95USD you will get Pro version 2.1 with unlimited support and upgrades from me.
Today I am giving the CHRISTMAS OFFER. Now Testimonials Pro Verions 2.1 is available at $15USD( $24.95USD) for unlimited support and updates.