"MyChat Client (Windows)", "Console commands (under construction)", "Internal commands", "Profile".
The command opens Windows Explorer in MyChat Client user profile.
Profile
Windows Explorer opens in the folder of MyChat Client user profile.
%USERPROFILE%\MyChat Client\
If the last folder of MyChat Client installation path is not default (e.g. D:\Work\Messengers\MC\), then your profile will be in the folder "%USERPROFILE%\MC\".