As I wrote before it depends on your system display scale, which neither of you reported.
Look I reproduced it for you by running at 150% on a 3840x2160 monitor.
When you look in View > Application log it reports:
[Info ] <MainWindow::MainWindow> device pixel ratio = 2
Because the GUI does not support fractional scaling and rounds 1.5 for 150% up to 2.
And here is what it looks like when you run it with the command line argument I provided:
You can put that into a shortcut’s Properties > Shortcut > Target.
Now, the log reports [Info ] <MainWindow::MainWindow> device pixel ratio = 1 .
I can also go into the exe’s Properties > Compatibility > Change high DPI settings > High DPI scaling override > System (Enhanced)
to achieve the same thing:
I am not going to downgrade our main GUI library. You can accept the new look and size, change your display scale, apply an override mentioned above, or run an older version. If choosing to accept the new text size, you might find it helpful to use View > Show Small Icons.