I updated my firmware to 0.70, and now get no WiFi. When I power it up, I get a solid video (green) LED, a slow (@ 1 sec) blinking WiFi (blue) LED, and a slow (@ 2 sec) blinking GPS (orange) LED. I updated from V0.56 if I recall correctly, but cannot locate that version to reinstall. I just bought two units, and both worked fine when I tested them. they are slightly different versions; the one with this issue has plastic power and GPS connectors, and a plate with screws over the ports. The second one has a rubber cover over the plates, and metal connectors.
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Sounds like the same problem as here
https://www.innovv.com/forum/main/comment/5f9b3c6558acd2002d26743f
For him it helped to install the V74 beta and then go back to the V70. I don't know why it helped for him, but maybe it will help on your K2, too.
You can find all released firmwares in my dropbox
https://www.dropbox.com/sh/b5cqpgzwd72nxno/AAAbJPissy6LCaH-tlWmsryja?dl=0