When you download and install a language distribution, the license is included. It is not necessary to register or install a separate license in order to use the product. You are given the option to register when you download the product, but this registration is only for the purpose of receiving email announcements regarding new product releases.

When you download and install a programming or productivity tool, you must register in order to receive a license that will activate the product. You cannot use the product without installing a license. Time-limited trial licenses are available for all products. Some products, including Komodo and the Perl Dev Kit, have an educational license that can be purchased at a discount.