I am using the Groupy version 1.42. So far, it is working fine.
But I am a little incommode with the fact that I cannot decide what language will be displayed in Groupy, because it uses automatically the language setting of Windows 10. Because I am running the german edition of Windows 10 in combination with the german language setting, Groupy uses also the german interface. So, I have noticed that the current version is not competely translated into the german language (please see the attached sreenshots).
1. Missing Translation ("Advanced"/ Button "On"):

2. Missing Translation (Windows "Advanced"):

3. Grace note: "möchte" → "möchten"
