Cisco Jabber Remove Custom Forwarding Number

In Cisco Jabber for Windows when I forward to a custom destination, I am unable to remove the custom destination.
I can quickly pile on a large list here, because the only way I can remove the custom destinations is by doing a RESET. And I am trying to avoid resets.
In this image, you can see the custom number ending in 0120.
But how do I get rid of it?
It was a one time number, I'm probably never going to use it again, but, now... there it is... forever, until I have to Reset, or upgrade my computer.

Can we add a little Red X next to custom numbers?
Kind of like the Custom Status delete button?

An original discussion by @LCP_BO on this topic is available here.