There is no possibility to obtain a trial version of Contact Plus Pro. They have a statement released on the official website, where you can check the status of the software, but to get to the point, here is it:
Contact Plus Corporation has shutdown. Due to business failure we no longer offer sales nor support of any existing software. Inquiries should be sent to webmaster at contactplus dot com.
As you can see, their product is not available anymore. You can check that here: http://www.contactplus.com/Contact-Plus-Professional.html