To find out more about Export Emails to Google Sheets by cloudHQ, click here.
To install Export Emails to Google Sheets, click here.
To start a wizard to export emails to Google Sheets, click here.

The PDF documents in the folder Emails are organized by label and email address.
The structure of the Emails folder looks like this:

Emails/
  All Emails/                  
  Labels/                       
    Label 1/
      Sublabel 1.1/
      Sublabel 1.1/
    Label 2/
    Label 3/
    ....
    
  Email Addresses/
    email1@example.com/
    email2@example.com/
    email3@example.com/
    ....

  1. The email messages which are under label under <label_name> are saved in the folder Emails/Labels/<label_name>
  2. The email messages which are under label under <label_name>/<sub_label_name> are saved in the folder Emails/Labels/<label_name>/<sub_label_name>
  3. The email messages which are sent to or received from email address <email_address> are saved in the folder Emails/Labels/<email_address>

So if you want to download all emails which are in a certain label just right click on that label and select Download:

save email; save email correspondence; save email exchange; backup to sheets;