Update to BQ40z50-R1

I notice there is a firmware update for the BQ40z50 device. The change list says that old devices can be upgraded.

With the new BQStudio I have a BQ40z50-R1.bqz file but there is no option to program a *.bqz file. Is there a *.senc file or some other way I can use the *.bqz file as I have about 20 prototype boards I'd like to upgrade.

Thanks