I've checked on the official website and it appears that there is another version of ZoomText released. You should update to that version (11.5) to avoid any compatibility issues. As far as I know, this type of behavior is related to compatibility and it you have the chance, apply it using right click on executable file.
Go to Properties > Compatibility and choose an older version of Windows from the list. If it's not working this way, obtain a new version from its official website.