Ubuntu 14 on Parallels on OSX

After installing Parallels Tools on Ubuntu 14 I had an issue where the launch bar disappeared.

This post had the answer (thanks BrettBranch) which I'm replicating here for my own record:

1. Login to the console: on my machine (MacBook Pro) it was
   Ctrl Alt F1
2. Check the X11 directory for an xorg.conf, change directory (cd) then list the contents (ls):
   cd /etc/X11
   ls
3. Rename the xorg.conf.[datestring] file to be without the datestring
   mv xorg.conf.[datestring] xorg.conf
4. Remove the config and compiz directories and sub directories (-r) without messages (f):
   rm -rf ~/.config
   rm -rf ~/.compiz
5. Reboot, forcing compiz to recreate the config:
   sudo reboot

NB: to exit the console: sudo pkill X