When using Fritzing on a hires laptop all captions and the toolbox are super-miniature (on a 3200x1800 Nvidia pixel laptop).
The breadboard and PCB layout areas are fine but the everything else and the component palette are VERY small.
Note: I had the same problem with Adobe Photoshop, they finally fixed it after a lot of people complaining about it.
It seems to affect a lot of graphical applications.
BTW the font size in all other applications is fine (also the main menu) so it is NOT a solution to change my font size in Windows as it will make all other programs appear HUGE. There is a problem in how your application calculates the required font size and image scaling. As a reference the font size of the to menu ‘File’ is the size one would expect for all text and menus (the letter ‘F’ of file it’s about 6mm high on my physical screen).