When I log on to MyVerizon on my PC it says I have no DVR. I have a multi-room DVR that used to appear. Your MyFIOs app works fine, but I'd really like to see my DVR on my PC.
1) Makesure your DVR's Network is working.
2) Contact Verizon and tell them your problem. If you reach the right person they can reset your account to start reconnecting to your DVR's.