How can I reset my theme settings?
In your admin panel choose design > then themes, then at the bottom
of the page choose a different theme entirely... if using aries choose
indi and make that your default and online theme and save at bottom of
page.
Now you can delete the aries theme you were previously using. Then
choose the same theme that you were using ie: aries again make it
default and online again and click save.
If you want, you can then delete the indi theme also. Keep in mind if
you have adjusted the Widget Layout: , and General Widget Style, those
are not reset.
Please also see this tutorial: Why are changes that I make to a demo / draft theme adjusting my active / live theme?