To change the Program that a User account first logs in to: 

Step 1 – Open your Navigation Bar if it is collapsed.

Step 2 – Click on "Site Administration".

Step 3 – Select "Manage User Accounts".

Step 4 – Find the User account you're looking for.

Step 5 – Click "Edit" in the "Take Action" column next to the User name.

Step 6 – Scroll down to the Site/Program Access tab.

Step 7 – In the "Default Program" dropdown, select a Program from the drop-down menu to be the default Program.

Step 8 – Click "Save." A pop up box will appear notifying you of the successful update when it has finished processing.