This issue is not fixed one the hosting side of things.
Open the NI FM8 plugin in the audio plugin host JUCE example on a 4K monitor on windows and the editor UI will bi tiny.
We can’t say that it’s not our fault and there is nothing that can be done because if you do the same in say Cubase - FM8 editor UI scales properly and automatically.
I’ve tried to use the “setScaleFactor()” of the AudioProcessorEditor class, but that did not do anything.
Is there any workaround for displaying the third party plugin editors on windows in HiDPI mode properly?
Btw… this issue is not only connected to 4K screens and high resolutions. A user may simply change the scaling in their display settings to make everything bigger and more visible, but this would be completely ignored in the plugin editor windows.