Gimp suddenly doesn't see my scanner

[denno]

I've reinstalled the printer-scanner  and connected it to the wifi again.  Twice.  Driver is up-to-date.
Canon mx490
Gimp still sees the printer, but not the scanner.
It was working fine yesterday.  My wife's computer sees it.

My device manager now calls the printer-scanner "Unknown Device"
IDs it as a printer, locates it on the M490 series with a long number after it.
Says it is working properly.

Any help?

Thanks