Unzipping the Download Archive
The Finder in 10.3 or later should automatically unzip the LBackup download archive. If you need to use the command line to unzip the archive on Mac OS X 10.3 or later then click here for command line unzip instructions.
You can unzip the file using other zip utilities such as gzip. However, you may have some additional files in the archive. These are probably resource forks of the files in the archive.