Thank you for the response and fully clarifying the situation. I would suggest however that you update your Knowledge Base to reflect this reality. the KB for BR 16 implies the PBF files will be supported in future versions and describes (incorrectly) how to do so. See the following (emphasis mine):
I recognize that having a free version of BR 15 technically does allow this, but it is not what the KB implies. BTW, double clicking on a PBF file in Windows Explorer opens BR 16, even if BR 15 is installed.]Of course the old backup format will not expire in the short term. It will still be available But we don’t recommend to use it to create new backups.
The possibility to restore old archives will be assured for a long time.
To access the old PBF format and the respective options please click the tool symbol top right in the menu bar and select “Legacy Mode”.