Sunshine is the app by TheRoot.ninja team that allows you to easily unlock your devices bootloader. It is compatible with many HTC devices and a handful of Motorola devices. Today an update was released 3.1.12 that adds support for HTC E9X. Sunshine is the closest thing to a one click bootloader unlock for the devices it supports. The app test your device for compatibility, then charges you $25, then proceeds to unlock your phone's bootloader and provide S-Off if necessary. This has to be the easiest way to S-Off and bootloader unlock your device. Grab the latest update from the link below.
Theroot.ninja