To fix a corrupted backup file, the most recommended way is we need to create new fresh database.

**Delete Database will not change file in monitored folder.

1. Delete old database.

2. Create a new database

3. Add Monitoring directory and save.

4. This will create a new database. You may check log for confirmation:

Other Alternative to fix is to do step 3. to save database and step 4. check the log. This step will refresh database.