How do I restore this file?

Hello!

I have been using PostgreSQL v8.4 and its associated PGAdmin version for a few years. I've only recently begin migrating to the PostgreSQL 9 world. I have PostreSQL 9.1 and PGAdmin version 1.14.0.

I have a backup file named WSC.backup. The file begins with:

--
-- PostgreSQL database dump
--

-- Dumped from database version 9.1.1
-- Dumped by pg_dump version 9.1.1
-- Started on 2014-03-12 09:37:01

SET statement_timeout = 0;
SET client_encoding = 'UTF8';
SET standard_conforming_strings = on;
SET check_function_bodies = false;
SET client_min_messages = warning;

--
-- TOC entry 248 (class 3079 OID 11638)
-- Name: plpgsql; Type: EXTENSION; Schema: -; Owner:
--

CREATE EXTENSION IF NOT EXISTS plpgsql WITH SCHEMA pg_catalog;

--
-- TOC entry 2861 (class 0 OID 0)
-- Dependencies: 248
-- Name: EXTENSION plpgsql; Type: COMMENT; Schema: -; Owner:
--

COMMENT ON EXTENSION plpgsql IS 'PL/pgSQL procedural language';

When I try to restore this file using PGAdmin, it says that it does not appear to be a backup file. The restore dialog box in PGAdmin has been completely revamped since 8.4. It's got two format versions: Custom or tar, and directory. It does not have the "plain" I'm used to seeing from 8.4. This appears to be a plain backup file. How do I restore it using PGAdmin?

Thank you very much.

RobR