Version 5 was a paid major upgrade. If you purchased a license for DC4 more than 12 months before the release of DC5, you will need to purchase a new license key for Duplicate Cleaner 5. However, if you purchased a "Lifetime Upgrade Plan" or purchased DC4 within 6 months of the DC5 launch, you may be eligible for a free key. Log into your DigitalVolcano account to check your upgrade status.
Version 5 introduces improved cloud-sync capabilities. It can identify if the same key is being used on a Windows desktop and a MacBook laptop simultaneously, helping you stay within "single-user" constraints. 3. Intelligent Pattern Recognition License Key Duplicate Cleaner 5