I hate you, new computer!

I got a new Macbook for Christmas as my old one was getting quite well...old, and this new one is ridiculous! I'm trying to set up drop box, so I'm trying to open the document that I keep my passwords in (safe, I know), but it doesn't recognise it as a word document, so it just tells me that and nothing else. You stupid thing!

Glah! I hate it.