This only applies if you have already registered version 1 of SharpEye.
First, you should download and install SharpEye 2 from the download page. This is a time-limited version which you can try for free.
Upgrade SharpEye v1 to v2 This is a secure web site where you can buy the upgrade for $119 (USD). You will be sent a registration key which will remove the time-limit.
Please note that your name and address will be checked against the customer list for version 1, so if you have changed your name or address since registering version 1 you will have to let me know by contacting Visiv
If you don't wish to pay over the internet, you can pay by other methods. If you are paying in British currency, the upgrade price is £65.