If you don’t see results it means you didn’t modify the code as you hope it would work.
I can’t help without seeing what you do.
Send me a screenshot to what image you wish to modify in front end.
Send me wp-admin to check the changes you applied and try a different combination.
Please use our support ticket http://support.wpestate.org/ and please keep in mind that such custom work requests take us a few days to follow up on as it’s free custom work and we do as much as we can in the available time we have.