You're Most Welcome.
I'm not fluent in Czech language.
As far as step-by-step is concerned.
If the game is running as it is intended.
Proceed as You did before the problem of it not starting.
Your personal experience may be better if translated by someone fluent to Your native language.
Sorry for the inconvenience.
English is the only language i am most capable of comprehending.
Have no one currently available for translations to assist.
Perhaps someone else here is better suited helping You here.
Sorry i am unable to better assist You.
Wish You the VERY Best, in Everything for Always~