Vega connected before you use AUDI. USB Debugging (not USB storage) on to use ADB and recovery mode to install stock ROM or use other flash installs. The installation instructions for each ROM or update will tell you which one you need.
Thanks for the prompt response. Just so I'm clear:
1. Power on Vega, and then set USB Debugging to ON
2. Power off the Vega
3. Bring the Vega up into Recovery Mode by the use of the Back and Home buttons procedure
4. Connect the Vega to the PC via the USB cable. (or should this be before step 3?)
5. Ignore all messages from the Windows OS about Found New Hardware and drivers etc.
6. Launch AUDI
Is that it?