Atom editor not opening correctly

I am trying to set-up Atom program on HP laptop with windows 10 home edition, 64bit. It worked properly on my laptop.
Uploaded program, opened it and am looking at SVG file, but instead of many lines of proper code, I am seeing one line with description MAC OS X. ?? I’m using Windows, so not sure why MAC even shows up.
Can you help?

See attachment.

I can see from the screenshot you posted that you are looking at a “hidden” system file, not the actual SVG file itself. The editor is very likely showing the correct content of this file.

The ._ files are automatically created on Mac OS where they are usually hidden. For more information on their purpose, see for example here.