High-level steps involved in the Fast Upgrade processThe Unica Fast upgrade process is introduced to help complete the upgrade process in a short time so that you encounter less downtime on your production environment. Also, Fast upgrade process will get executed on clean 12.0.0 environment, so users existing environment will remain untouched. Please note that the extension of script files on Windows operating system is ".bat", and on Unix operating systems, it is ".sh". When running scripts as suggested in this document, please choose the corresponding extension