Webcatcher - getting it to re-try for testing purposes

Earlier today, I changed the Webcatcher daily schedule.  However the Webcatcher.log file shows that the Webcatcher did not actually run at the scheduled time.

For example at 15:00 I changed the Webcatcher to run at 15:15 but the log shows no activity at 15:15.

Is there a process to restart to get Webcatcher to run again for test purposes?

Or does it only run once per day?

Thanks...