Cheatl does not solve your W*rdle puzzle for you, it only proposes possible solutions.
Start your English W*rdle puzzle as usual and transfer the answers from the W*rdle website to Cheatl. After clicking Enter or hitting Return, Cheatl will show you the possible solutions and the best excluders (to rule out letters, that have not been guessed yet).
If you are playing "Hard Mode", activate the corresponding switch with your first guess.
And now, good luck and enjoy your game.