When I ran the program it asked for a registration key. It says I can use for 30 days in evaluation mode, and it leaves a watermark on the converted document. I'll look at the page more closely, but I think it needs updating.

I found this in the Help file that comes with the program: "This program is Shareware, i.e. you can test this fully functional demo version for one month. After this trail period you must register or delete the program from your storage media."

Their web page is confusing.