WiFi no longer works

I don't know what's going on with this thing but it will not connect to the wifi network it was connected to previously. No matter what I try nothing works. Really getting frustrated with this device. Can anyone tell me if there is a way to get the dual 2.5 Gb ethernet PCIe hat going? I'm assuming the UB 20 kernel doesn't support it. Is there also a way to turn off all the particle mother ship connection stuff? I don't need it, don't want it.