Could someone please explain me - what this files should I use for?
Thank you in advance.
The Microsoft Support Page explains exactly what you're trying to do. It is an outdated tutorial on "signcode.exe" which is similar but not equal to "signtool.exe".
If you want a simple solution, you may want to try signtool's wizard mode (execute signtool signwizard
), e.g. explained here. But if command line execution is needed, check out the examples on Microsoft's support page.