ZeroBrane Studio 1.90 on MacOS 10.15.7
The minimize, maximize buttons of the finder handle bar are not reachable since they are at a negative y position (outside the desktop screen)
Fullscreen can be called via menu entry, but this is no help.
Close the IDE and open its configuration file ($HOME/Library/Preferences/ZeroBraneStudio Preferences, as described in the session configuration section) with your favorite editor. Find x and y values under the [MainFrame] section. If they are negative, change them to some positive value and save the file. Restart the IDE.