I can't find anywhere to change the default email client? I have Windows Live Mail set as my system default email client. When I try to send an email through RezStream it keeps popping up the configuration utility for Outlook 2010 (which is installed on the system, but not set up).
In RezStream you will need to go to Tools>Configure>Functionality
Make sure the box for "Use Outlook to send email (If Outlook is installed on Machine)" is not checked and then exit the program and come back in.