have tried it and I think it might just work...
Before doing anything BACKUP YOUR SD CARD ! !
Then find the files Scan/Make/Asia/Acura inside there you will see a car.bmp and a
car_new.bmp file.
Rename the car to car_new
Rename the car_new to car
You will have to do this for each vehicle you have software for....

Restart your scanner and see if you have the dealer logos. If it doesn't work. Just
reformat and install your backup.
If you update your software, you will probably have to do it again each time you
update..

Tell me if it works for you ?

All you have to to is to delete the car_new.bmp / car_new.png files and reboot the system.

on the MS906 I use file explorer to search for all and delete them all. Make sure in the setting the "delete cache on exit" is ACTIVE.
You get the new pictures back on every update.