Fedup 19 to 20 fails after stuck keyboard

[linuxnutster at videotron.ca]

I sent this one to the fedora forum; perhaps somebody here knows the 
solution:

Here's a new one. Right in the middle of using fedup to upgrade F19 to 
F20, an acquaintance came in, removed his notebook, and promptly dumped 
his notebook case on the upgrading machine's keyboard. By the time I 
looked back at the machine, the screen was a virtual hailstorm of 
looping back garbage. I rebooted the machine, and it promptly entered 
the last fedora 19 kernel; however, when I relaunch fedup, I get a 
notice that the system is already updated, which it obviously is not. 
How do I "force" fedup to relaunch the process?

Thanks!