how do i know, that the community patch 4.0 did work ?
I suggest you ask any questions about the UCP in the dedicated thread for it:
I doubt you’ll get much of a response in the tech support area because the UCP obviously isn’t an official GBX thing.
Short version is that you need to enable the console and activate the patch everytime you start the game. The thread @VaultHunter101 linked to has all of the relevant information. Enabling the console requires you to use a hex editor on the exe so we can’t discuss how to do that here.