Well you need ot buy it, as they say in the program.
Freeware programs are programs that are FREE. Goldwave is not a freeware. You have the trial version, it is different.

Do you really like Goldwave? Then buy it, it is not expensive considered the amount of work the programmers invested in this program.

Also you could check other programs. As far as freeware, you can find ALL of them at downloads.com: http://www.downloads.com

Good luck. if you have any other question do not hesitate
See you around