Then how about appending a date/time string to the default filename for backups? Currently, the default filename is always {Business name}.manager. If that is accepted, the new backup overwrites the old one. If the default filename could be {Business name}-{date}-{time}.manager (e.g. Acme Widgets-20160408-134402.manager), then the old backup would not be overwritten.
And also how about having Manager remember the file path (or allow the user to set a default backup directory) so the user does not have to navigate to the desired backup directory every time?
Anything that can make backups easier will encourage users to backup more often. Automatic backups would also be nice, with user-configurable options like location and frequency.