I tried to follow your instructions to get rid of smartsearch.pw, but it did not work. There were no suspicious files in Applications in OS X. Then I tried it on Safari, and got as far as step 5, but I think I must have a different version of Safari than you. There was no Reset Safari option in my menu.
I tried to to get rid of smartsearch.pw. But it does not work
amollie71, | Smartsearch.pw