mangOH Red Air Vantage account


My mangOH Red originally came with a WP8548 module, and I was able to register it with Air Vantage (part of the creating account process) and communicate to it with the module. On my mangOH Red board, I am now using an HL7748, and wanted to see if I could use Air Vantage with the HL module, but I do not see a way to register another device. I also deleted my WP8548 module from it (thinking that might let me add a different module), but I still can’t find a way to add the HL. I do not see a “Register” menu on the webpage. My account type is trial, so perhaps that has something to do with it?