Whoops. Been there, done that on my PC (I now have cron jobs setup to do automatic backups).
You'll have to restore the original files in /home/zaurus. I doubt you can use 'recover' since the filesystem is in RAM on your 5500.
To restore the original files:
1) Login to the console as root
2) cd /
3) tar xvf /root/.home_default.tar home/zaurus
(Note there is no '/' at the beginning of the 'home/zaurus' in the command above)