Not sure if you have tried this but as always first make a backup of your settings. Next try a system reset, Turn KPA off/on, then attempt the upgrade. Don't think I've read over to many posts with problems from 3.0.1 > 3.0.2.
How long did you leave it at 49%? I think mine took a little while at one point in the upgrade, like few minutes, but can't remember for sure. Could have to do with how many Profiles you have residing on the KPA also
Good luck!
I did the factory reset as you suggested...and then it worked Thanks a lot my friend for your kind support!
Have a nice weekend