On a non-Retina screen/monitor, the text in the settings/preferences for Alfred 4 (4.0.1 b1078) is very blurry.
Retina screenshot: https://bluetide.pro/5QjtAm
Non-Retina screenshot: https://bluetide.pro/opJXgB
^ See the screenshots there to see the difference. NOTE: You have to be on a retina screen to see the blur easier.
I'm on macOS Mojave 10.14.4, btw.
Let me know if you need any other info!