Regarding the GUI appearance
It looks like you are using Windows 11, which I have never tested. I know sometimes Windows is setup with a font scaling default greater than 100% on high DPI displays. I've never spent the time trying to setup the code to scale automatically or look correct on anything but 100% scaling. Same thing with window size - that would be another effort to make it adjustable and has not been my focus. When I have some free time in the future I will investigate how this might be implemented. In the meantime, look in the Windows control panel under display and there should be a Scale and layout setting with a text size percentage you can change. Try 100% and see what happens.
From your first question, there was a problem with certain scans with the Rev C Caveatron that would not load in older versions of Caveatron Process. This has been fixed in newer versions. Please use version 2.5.0 and see if that helps.
Also I was unclear from your description if you were trying to select and review multiple scan simultaneously. You can only review and process one scan at at time.
Joe