DesignLink registration is free of charge at http://www.element-14.com/DesignLink. When “run designlink” is entered from an open design file in EAGLE, a ULP will execute to demonstrate the new user language functions added to EAGLE. The ULP will also provide a link to DesignLink credentials for free registration.
In version 5.10.0, the Chinese version of the software will now automatically install mandarin versions of the manual as well as a tutorial where it is the default language. Additionally, Mandarin and Hungarian menus are available.
Full details can be found here