Version 3 beta

Guess it detects your screen resolution wrongly. Try the -d DPI commandline option

There is also now an option to specify the font size used, see Edit / Preferences. Previous versions always just used whatever the OS was set to use, but enough people complained about not being able to make MsueScore bigger or smaller than the rest of their system (I never fully understand why) that we added explicit commands for this. Unfortunately, that means if you had previously set your OS defaults to be bigger than average, the defaults in MuseScore will now look smaller in comparison (depending on how you made this setting in your OS - different systems provide different controls for this, and some do cause MuseScore to scale the same way). The number of different permutations out there is pretty staggering.