To update or change your TreeSize Professional license key, you can do so directly within the application without needing to reinstall the software. How to Update Your License Key Navigate to the tab on the top ribbon bar. Change license key

Different license types affect how you manage keys across systems: Consultant License:

If you are on the fence about upgrading your license, here is what the Pro version offers over the Free version:  Scan Network Drives: Analyze servers and NAS devices. Detailed Reporting: Export data to Excel, PDF, or HTML.

No, if:

Malware Warning: Hackers frequently use fake websites and malicious ads mimicking TreeSize to distribute Trojans and viruses.

If your key is marked as "invalid" during an update, it may be due to one of the following: