Hopefully skrommel, the author will respond and, ideally, post a little statement about his apps in general.
Could you perhaps draft a short minimal suggested "license" for him, that he could adopt?
Having said that -- skrommel has never expressed anything but approval for people taking his source code and modifying it, and if your intention is to make an open source fork, I cannot fathom a scenario where skrommel would object to that for the MoveOut tool.