: Moving to the current version (e.g., version 10) typically requires an upgrade fee, though existing customers can receive a significant discount by entering their version 9 key on the FolderSizes Upgrade Page Important Precautions Silent Installation & Licensing for FolderSizes v9

: If you have already purchased FolderSizes 9 and lost your key, you can typically use the License Key Retrieval tool on their support page by providing the email address used during the original purchase.

: Starting at $499.00 USD for single consultants, with tiered options for organizations and global sites. Free Version

Instead of hunting for an invalid key, consider these ethical and safe options: