Hi again

I'm going crazy with this, I hope that someone can help...

When I want to save a file as CSV, the data gets separated with a semicolon instead of a comma.

I googled out that most people solved this by changing it here: Control Panel -> Regional and Language Options -> "Regional Options" tab, "Customize" button -> "Numbers" tab, "List separator".
As a list separator, I really found a semicolon, as expected. But changing it to a comma didn't solve a problem!!!

I should add that on the same pc everything worked fine until a few weeks ago... And I don't remember changing anything that could have caused this... Does anyone has any idea what else I could try?