The official website where the software is supposed to be located doesn't have anything about PostPro. I've then switched to using Google, but the only thing found is a PDF file that mentions the name of the application without any troubleshooting, instructions etc., therefore you have to rely on the built-in Help section to find out about the various filtering options (if possible) and the data export (again, if it's possible) commonly available through the File menu.
You would like to forward an official inquiry to the developer, then use this website: http://www.gdsinstruments.com/contact-us