NHR Database Cleaner shows what your WordPress database collects and no longer needs, lets you preview exactly what would be deleted, and cleans it up on demand or on a schedule. It also edits options and meta, tunes autoload and optimizes tables.
It is a database cleaner and optimizer, not a malware scanner: it removes unused data, it does not look for malicious code.
Start with Install. If you bought Pro, then activate your licence.