I think I have discovered - at least partly - why I don't see the button "Update File" on the Editing sidepar.php (in Theme Editor)in the bottom right hand corner. However the button is in that location when I go into my other two blogs (thehairtalkblog and easy-formal-hairstyles-updos.com/blog and go to "Theme Editor")) - but I do not get it with the dorismollerhairstyling.com/blog because the page that I get - in the Theme Editor - has the title "Browsing" sidebar.php and there is no "Update File" button on that page. I have tried many times I simply do not get the page with the title "Editing" sidebar.php when I am in dorismollerhairstyling.com/blog. It's always "Browsing" instead of "Editing" that shows up.
This is why I am unable to update a file. Would you know how that problem can be solved.