Hi,
Our plugin uses the wp_mail() (WordPress core) function to send the emails. Not receiving emails can often be related to your web host. You may want to check your SPAM folder before taking the following steps.
The first thing you could check is whether the email is sent. A handy plugin for this is WP Mail Logging plugin. If no email is sent there is probably a conflict with another plugin or your theme.
If an email is sent but not received, check that the From Name and From Email are set correctly (admin menu-> downloads-> messages). Make sure that From Name does not contain special characters and for From Email use an email address attached to your own domain. Some servers may require a mail user account has been created with this email address.
If there are still issues with receiving emails, then there is probably a problem with your host’s email server. You could use a dedicated SMTP provider to send the emails, so that emails are no longer sent by your own server.