I have 3 XBee-PRO 900HP modules and 3 grove development boards (I bought the DigiMesh kit). Initially XTCU was able to discover all of the modules when plugged into my usb ports, but then it stopped being able to discover all three of them. Today it can discover one of the three modules, but still cannot discover the other two. I have tried using the XBee Recovery tool. When I do so, XTCU tells me that the "Firmware Updated Successfully", but XTCU still can't discover the modules. I found some additional trouble shooting tips on the digi website, but those tips seem to be written for a PC and I have a mac. I haven't had them long (I've only worked through the tutorials) and I can't think of anything I could have done to damage them. More frustratingly, I can't figure out how to determine if they are damaged. Any advice or suggestions would be appreciated. Thanks.