excel viewer & creating csv

I just had a chat with online support, and the man on the other side of the screen (Mark) was very helpful. My problem seems to be excel. When I open csv file in excel, it is completely incomprehensibly. Mark opened the same file in libre office, and everything was understandable. So, my question is: does anybody know how to open csv in excel so I can see fields in a logical way? Then I can use this plugin, otherwise I can’t. ??