Hi Dave,
on the new install I first had to install qt5 using anpm, then I installed the dooble version from anpm too but did not start it. Instead I replaced it with your most recent version, so yes, this was a completely new profile.
By the way, yes qwant light loads slowly in dooble, loads a lot faster in firefox, but I like this search engine. I even defined it as the seacrh engine to use in the search bar of dooble.
Holger