A manual for the Helix line of products are available using the links below. These are great manuals if you are just getting started and want an overview that will give you the basics quickly.
There are manuals available for the SimpleBGC GUI as well. These are very detailed manuals that are great for reference when you want to find out more about something that you see in the GUI. They would likely be a bit overwhelming to try to read/understand when you are first getting started. Select the appropriate manual based on your current firmware/GUI version.
2.55 b3 GUI manual (the most recent manual available)