Have a look in this thread:
[url]Moving files around via context menus]
The code you´re looking for might be this one:
@dirsonly
@nofilenamequoting
Copy MOVE FILE "{filepath$}\*" HERE
Delete QUIET NORECYCLE
I´d strongly advise you to check it in some test folders first, because they contain a "dangerous"
Delete QUIET NORECYCLE, so your empty folders will be erased.