Hi.

I installed first by just clicking on the setup file, seemed to work. The app is available on my Pc. However, absolutely nothing happens when I try to open it. 

I then found https://itch.io/docs/itch/installing/linux/
The issue now is I can not figure out how to uninstall the app again,  I don't know the package name, so that I can try a re-install.

To uninstall: 

~/.itch/itch-setup --uninstall

But run the application from a terminal; you should get an error which will let you know why it's not working.

From what I've read, a common problem in Linux is that the application fails to start in sandbox mode. The simplest way would be to run the application with the parameter:

--no-sandbox