[ubuntu] convert vdhx to vdmk

I have a .vdhx file (created with the disk2vhd Windows utility) that I would like to turn into a VMware .vdmk file.

I realize I should have generated a .vhd file but it took a whole bloody day to do this one and I would rather not go through that again. I also realize there's VirtualBox and Vboxmanage but (a) I can never get it to work (b) VirtualBox doesn't have drag-and-drop into a Windows VM, while VMware does).

So, oh ye great gurus, is there a potion to remedy what ails me?

I thanketh thee in advance!