Log in as customer issue

i installed a this mod in my test site everything was working perfectly, then today i went live with the site and got rid of the test.gorillagear.ca. then i noticed this mod didn't work and after a few hrs banging my head into the wall

i changed the configure file back to test.gorillagear.ca and pointed the subdomain back to it and everything works fine

what the hell is going on

hiw wiould i uninstall this code

INSERT INTO configuration (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, last_modified, date_added, use_function, set_function) VALUES ('Master Password', 'MASTER_PASS', 'yourpassword', 'This password will allow you to login to any customer's account.', 1, 23, now(), now(), NULL, NULL);

after looking a a few uninstall sql files from otehr mods i assume i would need to remove the replace the insert into with DELETE FROM

this has nothing to do with backing up before installing a new mod this was the 8 mod out of 30 that all seemed to be working fine on the test.domain, but now i wonder how many more mods aren't going to like the change over the the www.domain