This program is shareware. This means you can only use it for 30 days, after this period you have to register or you'll not be able to(Un)compress anymore. The registration fee is 20$. You can pay by sending cash in your local currency, equal to 20 US Dollar or a check to the address mentioned in the program. For more information about registering the HTML (Un)Compress tool, follow the instructions on the startup screen. Once you have registered, this screen will no longer appear and you will be able to use the tool longer than 30 days.