Unimportant, that's just because you don't use periods.
Just follow that tutorial, it was like this at me too.
But if you work with Excel, and working with money calculations, you will get a weird format (like 1.00.1.00 €) ^^. Then just change it back to comma, restart computer and it will work fine again.
If you don't understand the tutorial of the link, I can make one for you.
Just PM me.