Toppage shows slider picture and featured content of demo version

Hello, I've installed the Catch Everest theme and everything is working fine so far except the toppage. Somehow the slider picture and the featured content which I customized are not reflected on the toppage, instead the pictures and featured content of the demo version are shown. In the customizer preview everything is looking fine, but it is not reflected to the website. I already deactivated all plugins and tried a hard reload of the browser, but without success. It would be great if I could get a hint. Thanks in advance, TCSGS