Register menu is disabled, cannot enter the license

Help | Register menu is disabled in EAP (Early Access Program) versions of the products. It's by design, EAP builds can run for 30 days since the build date without a license. If EAP build expires, you should download and install the new EAP build (if available) or switch to the release build that can be registered via the Help menu.

Register option is also available at the bottom of the Welcome Screen dialog.