Changed VM that WDM is on, now it will only see factory reset thin clients

Question is pretty much in the title.

We had issues with a previous install of WDM (Workgroup) and the VM it was on, however nuking the VM and starting from scratch was not an option as we relied on the VM for other things.

We opted to install WDM on a different VM and it is now up and running & licensed.

However it will only see devices that I physically go to and factory reset, I can see in the settings of each thin client that it is looking for the old WDM location.

My question: is there a way to fix this short of having to go to each of our sites and factory reset each device one by one?