Are you only having issues with the popovers? Which one in the starter solution? Screentshot of your edits in Layout would help. I am assuming you are saving the changes.
There are a lot of popovers in that example file.
Exactly which one - on which layout - are you working with?
What did you change?
Are you sure that the one you modified did not change?
I try to change the Asset solution database, the popover I am trying to change is check-in and out items. I am sure the modified I did not change. When I go to layout mode I see my changes but when I go back to browse mode, the changes are gone and back to default. I attached this video, as you can see I change the popovers in check-in and out by deleting and changing colors but for some reason as soon as I go back to browse mode it would back to original color and fields. So in layout mode everything looks good but for some reason they dont get saved.
It got resolved. I was not changing the correct popover.