It's not possible to edit the header in the sticky modus. Default and mobile shows the normal interface to edit the parts. But in sticky mode, the interface does not come into view to adjust things.
I used the latest version 26.7.1 Also tried different browsers.
Please send us the WordPress dashboard and FTP access privately thru the contact form, which is on the right side at http://themeforest.net/user/muffingroup#contact, and we will check what might be the reason.
Please attach a link to this forum discussion.
Sending incorrect or incomplete data will result in a longer response time.
Therefore, please make sure that the data you are sending are complete and correct.
FTP you sent was not working, but I managed to fix that without it.
Please, check if it works correctly now. You might have to clear and refresh your browser cache.
Oh, sorry it didn't work, sorry about that. Glad you solved it! It works again.
What exactly did you do?
I had to make a small modification in the theme files.
This fix will also be included in the upcoming update.