DonTimo

Thanks for your answer. I tried this as well, but with no success.
I think this update function in general is a little bit “old fashioned”, one could provide it with a graphical interface, instead of only waiting for php memory limit to appear. Guess that would solve many questions on the boards, if it would be easier to update.

But remember when updating the plugin changes made in the CSS stylesheet of the plugin probably will be overwritten. Best is to add the code to the themes CSS and not to the plugins css!

In the file style.css in your themes folder, opened in a code editor, you have to add the code from above no matter what line, best would be after all the other code in this file.
Hope this will help you!

You have to add it to the theme’s css.

Thanks for your help. Solved the problem!