I wanted to address this issue again since I am having this problem too:
There are obviously two Updates 1.01 to download with the same filename (which doesn´t help troubleshooting, an "a" added would have helped). One is the size 50,5 MB which destroys the clean install and one 50,9 MB which has the movement bug and the problem with the arrow keys.
The movement bug affects not all vehicles (which is interesting), but I can not trace which vehicles are affected.