Registrations export/output

Hello everyone,
I’ve been trying to find information and looked through coding on the plugin but haven’t been able to find any answer.

Basically what i want when i export a CSV file from the plugin is the following:

Firstname
Lastname
Email
Phone

But the plugin is by default

Registration date
Firstname
Lastname
Email
Phone
Terms and conditions

So when i go to the CSV file, i would need to edit every single one of the registrations to get rid of registration date and terms and conditions.

The reason why i need it like this, is so i can easily import the csv file to Mailchimp for the mailing list etc.