ImageJ troubleshooting

Hi,
I have recently downloaded and installed Image-J and I want to use for data extraction off of images as well as for crystal size distribution measurements for geological thin sections. However, when I go to open an image, nothing opens up. In the taskbar, it shows that a window is open, but when I select it, nothing comes up.
I normally use two monitors so I thought the image could be loaded onto my unconnected second monitor but I moved all the windows to my one monitor and still, nothing comes up onto my screen.

Any help would be much appreciated!

Thank you in advance
Tawnee

It seems that it’s only certain jpeg files that are the issue. I can’t load jpeg images of graphs that I want to digitize (file attached).

Thank you in advance.

Tawnee