Search Widget

Hi, I have a question. I use a child theme with Catch Box Version 4.1. If I use Version 4.5.4 the search in the Widget Bar looks not so good: http://christus-gemeinde.net/Version-4.5.4.PNG (This is an example from a local version of the website.) Is it possible to use Version 4.5.4 but have a look like it is at the moment at http://christus-gemeinde.net? What changes must be done at my child theme? It would be great if you could help me. I also wish you a great year 2017. Best regards , mailhunter