SPD Server 3.x tables are not compatible with SPD Server 4.x tables, including tables in SPD Server 4.5.
If you want to use your SPD Server 3.x tables with SPD Server 4.5, you must first convert your SPD Server
3.x tables to SPD Server 4.x format. For more information
about converting SPD Server 3.x tables for use with SPD Server 4.5, see ACL Security Overview .
Upgrading from SPD Server 4.x to SPD Server 4.5
SPD Server 4.x tables are compatible with SPD Server 4.5.
No conversion is required to use SPD Server 4.x tables with SPD Server 4.5. You can start SPD
Server 4.5 using domains that include tables created by any SPD Server
4.x host.
Upgrading or Reinstalling SPD Server 4.5
If you need to reinstall
SPD Server 4.5, or if you install a newer release of SPD Server 4.5,
the installation process does not alter any files that have been modified
in the /site directory. Any custom
modifications that were made to installation files are retained when
you upgrade SPD Server to a subsequent release.