I realize this sounds like something a person ought to be able to figure out on his own, but the UI doesn't seem to be providing a way to do this.

I've completely deleted a VM from my server and now I need to remove it from the backup job so I don't get partial failures.

I can edit the existing job, yes, but when I do the list of included VMs at the right is static—there's no way to perform operations on the list. When I follow the Next->Next progression, the now-deleted VM persists in the list of selected VMs.

What am I missing?

I'm running BDRSuite Backup Server v7.0.0.