Thanks, but nope, the "Printer Shape" page shows X=0, Y=0, Z=291.86.
It seems somewhat random. I do not change any settings but sometimes when it starts up it does the steps, sometimes it doesn't. I never know and have to be ready with the Reset button as I do not trust it to stop at zero when it takes off like that.
A few days back it had cleared everything when I started the next morning. The only thing that remained was the name of the printer. It had reverted to "Classic Printer" but with the former Rostock settings (radius etc) still visible.
I have since entered my A6 settings back in and now it is happy with both the Rostock and A6 -- so far.