Still getting the issue, even in the Lanterna module. Just to test it, I put a copy of the toolset on my laptop (fresh version downloaded, so nothing from the desktop anywhere near the installation), and even on a completely different system, the result is the same.
I'm running Windows 8 Pro on both my laptop and desktop. I don't know what OS you're using, so I don't know if that has anything to do with it. My desktop and laptop are vastly different (one is a dell, one is an HP). But the outcome is exactly the same. You might see if you can replicate this or if anyone else is having this issue.
To be clear, what I tried to do was pull a goblin and put it out onto the "Home DS" default map. I also tried to do the same thing with a skeleton, to insure it wasn't an issue with that particular monster. So, not sure what the refresh error is about.