This happens when the directory you are currently running FileBack PC from is not the same directory as the original installation.  The copy that is being updated is the one in the original directory, not the one that you are running.  To fix this problem:

1. Update your copy of FileBack PC to the latest version when prompted.
2. When the new version begins to run, open the FileBack PC configuration window and click on the "Options" page.
3. Un-check the "Load at Windows Startup" options.
4. Re-check the appropriate "Load at Windows Startup" option.

This will remove the startup link to the older version, and restore the link to the newer version.  We also suggest searching your hard drive for FileBack.exe, and deleting the older versions of this file.