Purchase a license
The LE version of Blue Iris supports a single camera only; the full version supports multiple cameras, and includes support for Windows Media technologies.
License the LE version ($29.95)
License the full version ($59.95)
NOTE: If the RegNow server is ever down, you may instead use PayPal to send the license fee to register@blueirissoftware.com and your license code will be sent to you via email.