How can I choose which welcome emails are sent (after being delayed)?

To send these delayed welcome emails go to Admin > Settings > Email (dropdown menu) > Delayed Emails and do the following:

1. Send only selected emails

Check the specific emails in the 'Unsent emails in the Email Queue' that you want to send and click submit.  The number of emails checked will appear in 'Send only flagged delayed emails from the Email Queue' (in the box above).  Tick the checkbox in 'Send only flagged delayed emails from the Email Queue' and click submit.

2. Send all emails in the Queue

Tick the checkbox in 'Send all delayed emails from the Email Queue' and click submit.