The Wincmd.key file is encrypted and integrity-checked. Changing even a single character (e.g., "John" to "Jon") will break the checksum, rendering the key invalid. The name embedded in the key is the name you provided at purchase. If you need a different name, you must purchase a new license or contact support for a transfer (rarely allowed).
Understanding Wincmd.key: The Total Commander License File Explained Wincmd.key
A versatile, Swiss army knife-like file manager, supporting compression, FTP, and image viewing. Version Validity: The Wincmd