Solved: this is reportedly a limitation of the demo version.
Dune 3 (Demo) does not remember chosen skin and always use the “Default” one.
So if a user uses a 4K monitor at 200%, they are forced to change skin/size to “Huge” over and over again each time a new Dune 3 instance is created or an existing project is reopened. This is unusable.
Other VST instruments (such as u-he’s synths, Arturia’s synths, Spire) remember their size either permanently or at least per-project. Dune does neither of these.
Also, it would make sense to change skin/size automatically depending on the OS zoom level — this is what standalone DPI-aware applications usually do without a need for user to change app-UI scale manually. For example, it would be natural to change skin/size to “Huge” automatically at OS zoom of 200% when a new instance of Dune 3 is created, while (important) maintaining skin/size of previously created instances including those in reopened previous projects.
Thanks.