Unrar and install the application.
Choose license file in the folder /keygen/ more suitable for your native language (russian or english). 
This is because of instructions are inside of this file.
Edit chosen .lsp file according inside instructions. For getting application key choose option GeoTools -> Display Application Key
Once start AutoCAD as admin, choose option Service->AutoLISP and load above edited .lsp file. License file (.rgs) will be generated.
Restart AutoCAD.
NOTE_1: you have to use \\ (double slash) while editing .lsp file not \ (single one)
NOTE_2: if you have ACAD without stored serial number (for example, using ACAD 2022 with patched flex routine in the main executable),
you may activate it the same way with ANY other previous ACAD versions!