MacZ Software has released
Project Backer 1.0.1, the new version of the project backup application that generates backup copies of your files automatically while you’re working on them.
If you overwrite something you weren’t supposed to overwrite, just go back to a copy that Project Backer has saved for you, according to MacTech magazine. The app even timestamps the backup copies. Version 1.0.1 brings in support for Mac OS X v10.1.
Project Backer 1.0.1 is available for download now. It’s a 840k file and costs US$10 to register.