Cubase 7.5 - Groove Agent SE4 query

On the pattern library bar for Groove Agent 4 SE the manual for this indicates that you can right click on the pattern library to “show in explorer” so that you can edit and change midi patterns. On my installation this option is greyed out and I cannot access explorer.
Is this a bug or does something else need to be enabled??
Simon UK

Think I sorted this as the manual states that only user defined patterns can be viewed in the windows explorer