Start EOS Utility v2 (only one tested) and connect 7D in video mode via USB. With MLV/MLV Lite/RAW recording set to OFF LV option in EOS Utility works. With MLV/MLV Lite/RAW recording set to ON nothting happens after hitting LV button in EOS Utility. Tested with latest nightly build (01.Aug.2017) and build 28.Apr.2016.
Will - most likely - also effect other remote control programs/apps working via USB.