From Make Music

• XP/Vista/Windows 7/Windows 8/Windows 10 (64-bit compatible)
• 800X600 minimum monitor resolution
• Internet connection (for installation)
• Minimum 512MB RAM recommended
• 180MB hard drive space required
• High resolution displays are not currently supported

I don't see Windows 11 supported.

A friend of mine has it working over Windows 11 but I have no clue as to anything she might have done in setup.

I would suggest trashing the Preferences file and starting from Default.

Could it be the Windows version? 

Run Windows compatibility mode utility. You can select run in Windows 10 mode.

I was unaware of the compatibility mode utility. I tried the troubleshooter, but it didn't give a satisfactory solution. I used trial and error with manual settings and finally came upon a solution:

Compatibility mode was not needed.

I opened High DPI settings, checked both boxes, then selected "I open this program" for the first drop-down and "System (Enhanced)" for the second drop-down.

That fixed the problem.  I'm not sure all of that was needed, but thanks for directing me to it.

Problem solved!

I recommend amending your original post with the word, Solved, in the title. This will help others with the same problem searching for a solution.

Thanks for reporting back!

Mike, thanks for the suggestion. I have done that.

Compatibility mode was not needed.

Perhaps, no but maybe, yes. For future reference see screen shot.

Just another possible way to get older programs to work.

For my specific case, it makes no difference if I have compatibility mode checked or not.  The only thing that resolved my issue was modifying the high DPI settings.

Of course, that's on my system.

Well, Mark, bottom line you got it working and that is all that is important. I just wanted to show you how the Compatibility utility works in Windows in case you ever needed it in the future.