Procedure to import a site to Acquia Dev Desktop
Dev desktop hides the settings file on local sites, so it's a little difficult to see what the settings actually are. 

Looks like you're on windows. Hopefully you can find the directory your local settings are stored in by looking at where they are on my mac:

~/.acquia/DevDesktop/DrupalSettings/


The local settings file name has the pattern:

cld_prod_&lt;site_name&gt;_&lt;dev_test_prod&gt;_default.inc


Don't change this file. But you can see if it's accessing the psr_admin user you set up. By default my settings file shows the user 'drupaluser' with '' (an empty string) for a pw.