Click Window > Preferences > JBoss Tools > Project Examples.
The check box options include 'show readme/cheatsheet file' and then further down specifically for cheat sheets radio buttons for cheat sheet behavior.

I think the labelling of 'show readme/cheatsheet file' is left over from earlier. With the new cheat sheet functionality, I think that option should just read 'show readme file'. And then the radio button 'Always show' etc. deal with cheat sheets.