Indexhibit Support

Following a similar post that is closed now, after upgrade could not remove yellow bar and still saying 2.1.5 at bottom , so downloaded 2.1.6 php file from github.

I'm confused as now when I click on yellow bar, it takes me to error message in github - with this URL:
[my-site-domain]/ndxzstudio/?a=system&q=upgrade

appreciate any help!
thanks

Solved, i made the mistake of only downloading the php file rather than the whole folder from github.
now works, yellow bar gone and update complete.