How do I get rid of an old backup destination drive in Ghost?

I had used a network drive for backups, I have since removed it but Ghost still complains it is unavailable. The backup destination management utility lists the drive but will not allow me to execute any of the options.

I had used a network drive for backups, I have since removed it but Ghost still complains it is unavailable. The backup destination management utility lists the drive but will not allow me to execute any of the options.