The Photomatix Pro download includes the Plugin for Lightroom. If Adobe Lightroom is installed on your computer, the installer will also install the Plugin that lets you use Photomatix Pro from Lightroom.
For more information, see the Photomatix Plugin for Lightroom page.
If you haven't taken bracketed photos yet, you are welcome to download these samples:
See how to set up Automatic Exposure Bracketing (AEB) on various camera models.
For tips and other useful information, see the Photomatix FAQ.
The User Manual is available from the Help menu of Photomatix Pro, but you can also access it online here:
Lightroom Plugin for Photomatix Pro 4.2.7 (updated for compatibility with Lightroom CC)