If you already own a license but have lost your key, or if you want to purchase a new one, use the official channels:
Unlocking Total Commander 10.52: A Guide to Features and Official Licensing total commander 1052 wincmdkey free
This is the personal registration file that contains your license information. Once placed in the Total Commander installation directory, it removes the "nag screen" and registers the software in your name. If you already own a license but have