Just to let you know; I got it working again.
The revolution slider latest version conflicts with the jQuery Updater plugin. The previous version didn’t.
I have send a message through the themeforest page and got a reply from Ed, that the latest version will be included in the next dante update.
Also for those who run into the same or similar problems;
disable the jQuery Updater plugin and realize that if you are having sliders placed on pages (so not the one full width at the top, but embedded in pages) in centered position, they will not be centered anymore. This is due to a (new) slider setting. If you put it on setting “hero” then it will be centered again as normal.
The revolution slider also hasn’t got a manual update possibility anymore. So it looks like that future updates of the revolution slider will only be available in theme updates from now on. Or so it looks like.
Thanks
p.s.: I don’t know how to set this topic to “solved”, please do so. thanks