Hi,
when Oracle is shutdown before the backup, you do not need any license to backup the ORADATA files. You have to create two script placed in C:\program files\omniback\bin or /opt/omni/lbin. The scripts must include the commands to stop or start the database.
I personally recommend to backup Oracle databases using the online integration (license required) as it gives you more flexibility in case of restores. If not applicable you can use a custom rman script too, to dump the database into filesystem before the backup is done. In this case you do not need to shutdown the database.
Best regards
Daniel
