http://www.apneaboard.com/forums/Thread-...es-Screens
I have not searched for recent threads regarding whether others have found a solution, so I apologize if this has already been posted, but I finally figured it out.
Go to whatever folder you installed Sleepyhead to. Right click on SleepyHead.exe. Left click on Properties. Left click the Compatibility tab. Left click box for "Overide high DPI scaling behavior. Scaling performed by:" Click on drop down box just below and select "System". Click Apply, then Okay.
For those of you who also have problems with Java scaling, this will also work for that, but it can be hard to figure out which of three java programs to do it on. It can be one of "java.exe", "javaw.exe" or "javaws.exe".
Hope this helps others who have been frustrated for months or years by this.