Upgrade to airtime 1.9.5 from 1.8.2 stalled....

On Wednesday afternoon I started a manual upgrade of Airtime 1.8.2 to 1.9.5 on our Ubuntu 10.04 server. We have a large database of 1,633 files totalling around 204GB. I attempted to upgrade via ssh and forgot to put the upgrade command in a screen, so had to restart it when the pipe broke whilst  the upgrade was reorganising files in the stor directory. I ran the upgrade command again and it resumed reorganising the files in the stor directory however it has now stalled at 1417 files...

I know it has reorganised this many files because I am checking it periodically with:

find /media/usb/PC2/airtime/stor/ -type f | egrep 'imported|organize|recorded' | wc -l

and

find /media/usb/PC2/airtime/stor/ -type f | egrep -v 'imported|organize|recorded' | wc -l

to see how many are left. It's been several hours since it last copied a file so I assume it's stuck - how can I complete the upgrade?

I've attached the install log

thanks

James