Don't know if this will help anyone but thought id post it anyway.
I'm not a fan of the Fluent theme top bar and prefer the header that comes out of the box.
To change it back to default go to themes -> AxenDev fluent theme -> Edit HTML & CSS
Open globalTemplate
Comment out this section of code
Then to get the userbar into the header (which was in the top bar previously). Add the code: {template="userBar" app="core" group="global" params=""}
here: