Restoring from SQL dump

Hello!

I am trying to restore data from an SQL dump. I am using Windows 7,
PostgreSQL version 9.3, pgAdmin III 1.18.0.

Here is what I did.

1) I used the pgAdmin III interface to create a new database.

2) I selected this db in the console and selected Plugins > PSQL
console.

3) Now I have a psql window open with the following prompt:
dbname=#

4) I tried typing the following:
psql -f M:\LongitudinalDB\backups\2013.10.02\uw.sql
and got the following error:
Invalid command \LongitudinalDB. Try \? For help.

5) OK, so maybe the backslashes are the problem. I then tried
psql -f M:/LongitudinalDB/backups/2013.10.02/uw.sql
and got no error.

6) However, none of the data or tables appeared in the db - it looks
just as it did as a fresh db.

7) I tried a few other things in the psql window, deliberately typing
nonsense. No error messages then, either, just a fresh prompt.

Advice would be much appreciated.

Thanks,
Erin