We support specific packages’ files like QuickBooks, Sage, etc as long as the raw data has already been backed up to a folder. This initial backup should be done using the built in QuickBooks backup utility. Viper Online Backup software will then back up the folder containing these files.
Just a note,  Viper Backup will back up raw data.  With some applications, the data is compiled with multiple files in multiple locations.  So backing up the folders with Viper, will back up the raw data, but won't guarantee success, if you are missing certain required files. 
Viper recommends ALWAYS using the programs back up function first.  Most products like Sage Act, Quickbooks etc, have a automated backup function that will backup the database to a compressed file in the folder you choose.  You can then have Viper back up this folder on a regular basis.