I installed Paragon Backup Free a few days ago and I scheduled an incremental daily backup.
Backups run automatically as scheduled, so no problem here.
By inspecting "My Backups", I observed all the archives have the property "Integrity check date and state" set to the value "Not verified yet".
That's peculiar, as after each backup such a verification goes on successfully.
That's even proven by the "Activity report", which clearly shows a "Succeeded [date&time] Check VD archive integrity" entry after each backup.
Trying to correct this, I just manually performed a "Check archive" task (click the archive > pick the option in the list on the right).
The check went fine, but the status of "Integrity check date and state" is still "Not verified yet"!