click on the right in the app, (the three slides)

then remove at the bottem....

Sorry Serkan,

You asked for x5 app so i guessed you ment the x5 (phone) app. But if you have not used this then go further below;

If you mean the project from x5, just select the project and use delete button, but make a copy in step5 export project before that, you never know..... You can leave it there as well, it won't harm.

If you mean from your webserver (from internet), click step 5 upload website, then use the folder icon next to destination folder, select there your files that are on your website host and use button on top to delete them, this you need to do manualy.

use mouse with shift button to select first item and then same for last item, this will select everything, then use remove button to delete completely from internet (your webhost).

you can also use an ftp program for this, like filezilla, or your own admin panel from your host compane, but as already stated x5 can do this also.

Hope this helps a bit better.

Best Regards