I just upgraded to 1.5.4, YAY!
I noticed that the Place Order button was missing from the Customers, but the Master Password was still present in the Configuration/My Store
I assumed that meant the master password is already present for the Login as Customer Module.
I installed 01_admin_login_as_customer.
The button is back!
I clicked the button and got an error:
Error: Sorry, there is no match for that email address and/or password.
What should I do next?

Thanks,
Christy