I’ve had Wappler 4.6.0 open for 1/2 an hour but I still can’t find the UI selector, a pencil, that is illustrated in old Wappler docs.
Search in Wappler and Docs and Forum doesn’t help.
I thought it would be easy to spot.
Are you running Wappler in full screen mode?
Also i see nothing old on this screenshot …
I’m referring to this – 19 Gorgeous Themes
I do not see where to access ANOTHER UI
NOW, because of your question, @Teodor I realize that Wappler in Full Screen mode in my 24" IMac M1 running latest Monterey loses that TEENY TINY Icon in the very top right.
Only after exiting Full Screen do I finally see that TEENY TINY Icon to access these :
I’m strongly suggesting that all icons controlling how Wappler is Set Up before even working in it – should be on the Left Side – not isolated on the top right corner as a tiny icon that disappears when Wappler is full screen.
And maybe a description link with a less dainty icon. 
In full screen mode the Change Theme icon is not visible.
That is the purpose of my screenshot.
Your question solved my problem, @Teodor
But in all my searches of forum topics and docs related to the Theme Manager & Wappler UI I didn’t find any reports of Full Screen causing this utility icon to disappear from the Wappler dashboard.
MONOKAI ! Whoopie!
Wappler does not lose anything, the top bar is hidden in full screen, that’s how it is supposed to work.