dv wrote:Admittedly, Pianoteq is the best in the industry in that regard, but it could be even better, in my opinion, if they abandoned this idea altogether and did what every non-music program does: be resizeable as the user see fit.
Most non-music programs, except games, use mostly standard user interface elements — text entry boxes, drop-downs, check-boxes and the like. They usually don't scale with the layout; rather, some of them resize to allow more or less content. (When you resize your media player window, the video resizes, but the player controls almost certainly don't. When you resize your browser window, the space for displaying a page changes, but the size of the toolbar icons and menu text doesn't. How the page itself changes is up to the page, but few pages scale text size or standard interactive elements.)
The user interfaces of most music programs consist primarily of items that contain a fixed amount of information, but are not standard in appearance. Scaling those with the window is certainly possible, but it's tricky and a lot of things can go wrong. I suspect most music programs use fixed scaling sizes, rather than auto-scaling to the window, because it keeps the layout predictable and lets them focus on the sound. I'm pretty sure the user interface in almost every "professional" music program already occupies a much larger part of development time and effort than users suspect or developers like.
Are you using a 4K screen? Perhaps something changed where Pianoteq used to reference one of the scaling factors set in the operating system (used to size the icons on your screen, text in message boxes, etc.) to set its default magnification, and now it isn't retrieving or acting on that information properly. It looks as if it "thinks" you have a typical (i.e. 1920x1080) screen and isn't taking into account the greater pixel density of a 4K screen.