Tim Spangler is the author. They are running in 2008 LD. The message appears when the lisp is loaded, right after it prints "Type LC to activate."
As far as I know, it is only on one PC this is occurring.
Also, as far as I know, it is his latest version:
LayerCreator.lsp v1.9.7
Copyright© January 2010
Timothy G. Spangler