Userstyles in Win App still possible?

Discussion created by IngoGuther1354526 on Jan 24, 2019
Latest reply on Jan 29, 2019 by DavidLeDeaux

Is it still possible to apply custom css through userstyle.css in ..AppData\Local\flowdock-desktop-win ?
Just tried putting the file there with some custom rules and overrides but it doesn't seem to affect anything.