that validates your license. While the software can be downloaded and used as "shareware" for free during a trial period, distributing or downloading "free" registration keys from unofficial sources is often unsafe and violates the software's license agreement.
The wincmd.key file is the license key file for Total Commander. When you purchase a license, you receive this file (usually via email). Placing it in the Total Commander installation directory unlocks all features and removes the startup nag screen. total commander 1052 wincmdkey free