Looks like the same problem I have. (Logo's have gone black since latest update)
Try sending a complaint to Autel support , if enough of us complain then they might at
least explain why they have done this?

 I'm having the same issue.  Have anyone noticed that functions are also missing.  Its probably in the owners manual and it gives a reason for the color change of the vehicle icon from red to black.  I didn't read that page and now I'm trying to figure out why.  It just happened after the last update.

Same problem right after the last update,icons turned gray and can't scan vehicles

Autel might have gotten into trouble using manufacturer specific colors on their icons. It was nice to have the colors, easier to find while scrolling through screens.