KM717 Bluetooth Keyboard stopped working

I have seen many posts here and wasn't able to comment with the solution but after buying 3 or 4 different KM717 Dell Premium keyboard from Dell and Amazon, I was extremely frustrated having spent so much money.

I finally found the answer online and thought I'd share:

Turn off keyboard.

Keep Esc+’ (Esc + apostrophe key pressed) and turn on keyboard.

Alternative: For those interested, these keyboards enter DFU mode with ESC+F1 held during power on.  LED light goes orange and keyboard advertises itself as DfuTarg to bluetooth for flashing.