elements problem

I have a copy of Photoshop Elements 11 and have been using it for several years on an HP desktop. I recently acquired a new computer and installed Elements 11 on it. It was working fine for about a week but today when I brought up the program to edit some images the image box and the top and side task bars were so small you would have to use a magnifying glass to see them. I played around to see if I could find the cause but was unsuccessful. The computer I had been using had Windows 7. The new computer has windows 10. Elements 11 might not be compatible with Windows 10 but everything was working perfectly for a while. The screen resolution is 3840 x 2160 and the screen size is 150%. I played with the screen size but it didn'e affect the elements display. If anyone can help it would be appreciated.