I updated the BrickPi3 and now I get a credentials box (name / password) which will not accept my credentials nor the original default name / password. However, I can remote in successfully but command line only, I was even able to run the BrowserBot program.
I still cannot get the Desktop to display via remote.
I did install & run TightVPNServer hoping it might give me a desktop via VNCViewer and I wonder if that may be the culprit; however, I removed it and rebooted but still cannot get past the login box.
I solved this by re-writing the SD with the latest image. Luckily there was little on it of my own so no real harm done; good learning experience. Would still like to know what might have broke & how to fix it.