Hey i accidentaly deinstalled the Launcher and now i can't start the Witcher 3 anymore. How can i reinstall the Launcher? Just deinstall the game dont work!!! Heeelp!

Installing games via GOG Galaxy creates shortcuts that launch GOG Galaxy. If you want to launch the game directly, open the installation folder and start the game executable there. You should also find a shortcut there that launches the game directly; this can be useful if the game executable is deeper down in the folder path.

If you want to reinstall GOG Galaxy, you can find a download link in the bottom right corner of this page. Alternatively, here are links to the full installers:
• GOG Galaxy 2.0.55.99 for Windows
• GOG Galaxy 2.0.55.81 for Mac