VSTI’s like recent Arturia Plugins do have a own gui resize feature. with the latest 3.2.0 (and 3.2.1 beta) this doesnt work anymore, but was working with 3.1.0 the mouse events are captured at correct scaled destination but the gui of the plugin itself is 4 times smaller. this might be related to the windows own gui scaling feature since this screenshit was made on a 4K screen. the only way to work around this issue is using compatibility setting and changing high dpi settings to “system extended”
yes but it works confusing. closing the window, changing setting. reopen. problem remains. changing setting leaving focus to a different plugin and then going back it will work. doesnt make much sense since the plugin is still loaded and not a new instance. just the focus change to a different plugin makes the trick. i would expect if i close the plugin window, change the setting and reopen that the new window will takes the new settings which is no problem from the vsti render api, but this doesnt work this way
In case it helps others who were stuck like me - you’ll find the Plugin Options for a VSTi by switching to the Plugins tab (next to the Edit / Mix / Sampler tabs), then click on the tiny question mark. That will get you to the Plugin Options screen taktik posted above. Unchecking the Auto-scale option got my Arturia Synclavier V plugin working again, and Waves VU Meter is another plugin that needs it disabled for some reason.
Also, a bonus feature I hadn’t noticed - if you hover the mouse over the question mark icon, you’ll get extra information about the plugin, like how many samples of latency the plugin has.