To upgrade the DCO 7.5 setup to the latest version of ITA, you must first update DCO to version 8.3.2:
Update your DCO 7.5 setup to version 8.3.2
Make sure you have a backup of your DCO 7.5 setup.
Perform a new clean installation of DCO 8.3.2.
Restore your configuration from the DCO 7.5 backup.
Create a backup this new 8.3.2 configuration.
- Upgrade your DCO 8.3.2 setup to ITA 9.x
- Perform a clean installation of the latest version of ITA 9.x.
- Restore your configuration from the backup of your DCO 8.3.2 setup.