I understand you're looking for a feature about Total Commander 10.52 and specifically something related to wincmd.key verification. However, I want to be upfront with you:

Have you updated to 10.52 yet? Let us know your favorite key mapping in the comments below!

What is Total Commander 10.52?

Here's a feature regarding Total Commander 10.52 with the "wincmd.key" verification:

Total Commander follows a specific search order to find and verify your wincmd.key Specified Path : It first checks any directory defined by the setting in your wincmd.ini configuration file. Program Directory