Network Manager died after updating oxideqt on Ubuntu 14.04.3

I have a big problem!
PC and Notebook both work under Ubuntu 14.04.3 (64 bit). After updating oxideqt with its libraries (29.01.2016) and rebooting afterwards Network Manager completely died. Rebooting doesn't help. NMCLI refuses to start because Network Manager has no version number. I cannot even send the crash report because I have no connection to the net. Neither Ethernet (PC) nor Wi-Fi (Notebook).
Moreover the Notebook has completely fresh install (some weeks) without synchronizing AppCenter with PC!
Even now for writing this I booted from LiveCD.

PLEASE HELP!

P.S. I cannot understand how but today (31.01.2016) both my computers started "telling" me that they've found new software updates without any connection to the net. When I tried to install these updates they finished unsuccessfully because they require to be installed from sources without authorization!