Hi Peter- here is a first shot at SaveACopy, using the Mitch method. At the moment it does not check for success, I'll see about adding that, and it also asks for a path each time. You can edit with a hard coded destination path if you like, I'll see if I can make it a bit more friendly if it is generally the right thing - let me know.
To use the script, extract and save the .rvb file from the attached zip archive, then drag and drop the saved rvb over an open Rhino v5 window. This will load the script, set it up to load on startup in the future and register the alias
that will run the script much like a regular command. An alias can be typed or added to a toolbar button or keyboard shortcut (F-key).
NOT heavily tested but it seems to work so far here.