Sometimes in a project, I experiment and save, and accumulate several versions of the same arrangement. Is there a way to delete the old versions when I no longer need them?
Start Furnish a Plan and click on an arrangement you no longer want. When you click, the name will be selected (highlighted). Now, click on 
(Kill Selected File -- at the right of the menu) and the arrangement will be deleted from your project. Be careful. Once you kill it, the file will be gone forever.
Another way to do this is to click Options/ Browse Files from the Main Menu. Once in the browser, click Files/ Kill Files and then follow the instructions.
http://www.hufsoft.com/QnA/KillFiles.htm