I made this changes and now the customers are getting the mail with the PW
Code:
dd Customers from admin addon
For version 1.06 it wasn't sending a welcome email when checked. I changed line # 420 in add_customers_backend.php in the admin folder from:

if($send_welcome == 1)

to

if($send_welcome == 'send')

And now it sends the welcome email successfully.

It did not cause the foreach error to go away though. Looking into it still. If I figure it out I will post an update.