PC crashed, audacity won't start now[SOLVED]

My PC locked up with Audacity open. After restarting the PC several times, when I start Audacity, I get the following “The system has detected that another copy of Audacity is running.” and won’t start. I’m running Ubuntu 12.04 and Audacity 2.0.0. I’ve tried killall audacity, deleting the audacity data dir and reinstalling audacity. Please help. All my data was saved. I just need to use Audacity for my daughter’s music.

When it crashed Audacity may have left its “lock file” behind.
The default location for temporary Audacity files is /var/tmp/audacity-/
(where is your user name).
If that directory is present, look in there for a file called audacity-lock-
If it’s there:
First, run “killall audacity” (just to check)
then delete audacity-lock-.

Thank you! It worked beautifully.