Adventurous – Problem single post – previous/next

Hi, I'm using your great Adventurous theme. Unfortunately I cannot delete the "previous/next" function in single posts, despite the fact that I have found in your support forum this advice: How to enable/disable Single Post Navigation? Go to “Appearance => Customize => Theme Options => Single Post Navigation” Check option “Check to disable Single Post Navigation” Finally, click on “Save & Publish” In my (German) version I cannot find in "Theme Options" the option "Single Post Navigation". I have the latest version/updates. Can you help? Thanks in advance and regards Wandi