By default the CSV file delimiter is set to ; (Semicolon) however, if you want to change that to a , (Comma) you can easily:

1. Go to the Tools menu > Options
2. Scroll down to the Output Format > CSV section
3. There you will see the Column delimiter for CSV file export setting which by default is set to ; (Semicolon). Simply change it to , (Comma) and your columns in your CSV exports now will separated by commas!