I have posted a support incident and got an answer from Jason Byrnes saying the same as you: "Extract the contents of the artist100.zip file, there will be other zip files inside that contain the CSS Sculptor layout or the Menu Writer Layout or the Site Assist Pro Layout, these are the zip files that should be selected when using the layout manager." But there are no inside zip-files. I have given Jason some more info about the file, which I unfortunately can't attach since it is 7 MB. Thanks for your help so far.