Hello Jerry,
Click on the 'View' menu at the top of the PHD2 window.
About half way down the options, you'll see 'Bullseye' is selected.
Click on 'No Overlay' just above that and the display will return to what you expected.
I guess you selected Target unintentionally before the last shut down.
There are several display screen overlays available.
I suspect the colour is determined by that chosen for the RA graph.
Cheers,
- Jack T
Click 'No