Cannot remove VM from vAPP in Catalog

Hi,

I wanted to remove 2 obsolete virtual machines from a vAPP saved to the catalog.

While this is possible when the vAPP is deployed and powered off there appears to be no option to delete a VM from a catalog that I can find.

Is this possible? Is there an alternate method rather than using the VCD web interface?

We are using VCD 5.1.2.1068441.

Thanks in Advance,

HG.