If a Cumulus Server or Client Installer detects a previous Cumulus version (7.0 and later), it offers an update installation. When you chose this option, the current preferences (e.g. View Sets, Asset Handling Sets, and saved queries) will not be changed.

The internal data structure of Cumulus  catalogs changed with Cumulus 9. When you first open a Cumulus 7 or 8 catalog with Cumulus 10, it is made compatible with Cumulus 10, but its index structure is not updated as this might take time. You can immediately start working with it. To update its index structure, you must migrate it. (For more information, see “Migrating Catalogs” in the Cumulus Desktop Client help.)

Catalogs from versions prior to Cumulus 7 must be migrated to Cumulus 10. (For more information, see “Migrating Catalogs” in the Cumulus Desktop Client help.)

Canto recommends you to migrate all catalogs. But as migrating catalogs to the Cumulus 10 data structure takes time (the larger the catalog file, the more time required for the conversion), Canto also recommends starting with using the Cumulus 7 and 8 catalogs as they are and then migrating them one by one during work-off-hours. Once a catalog has been migrated, it can no longer be used with older versions of Cumulus Server.