What is the difference between CuteChat Standalone and CuteChat DotNetNuke 2.0 and CuteChat DotNetNuke 3.0?

 

I would like to download a demo to decide whether to purchase this product but there are the above 3 choices given.  I just want to make sure of which one to get?  Does the 3.0 version indicate the latest version of the product?

Thanks!