OK, dug up an older Windows laptop, installed the software.
But in Calibration mode, the red and green boxes do not appear.
I searched old threads here and someone said try to change resolution, which I did. Tried rebooting, no luck.
Connectivity is there, two green checkmarks for the front and left sensors. Some of the posts indicate that it only works with desktop PCs, not laptops. Oh well, then I'm out of luck.
Also managed to download a few gigs of logs as well.
I did in the meantime examine photos and videos I took while it was throwing this error.
I stitched some of the panos, haven't created hyper lapses out of the shots but the one that the drone produced looks fine.
So the output looks pretty much the same as it was before the crash and before this error.
I guess it's just a question of whether to spend $400 to have the sensors checked out and then the covers replaced on the two top sensors.
I certainly want to use this drone as much as possible. I'm open to buying a new one at some point.