Worked for my W595...bit of playing around as instructions not very detailed, but got it myself via:

- Turn off phone
- Load up Aerix program
- Register [for FREE]
- Open your emails and make sure you click on the link to activate
- Go to "Tools->Settings" in Aerix program
- Enter username and password you chose when registering
- Press "OK"
- Choose your phone [I chose "W595"]
- Click on "Unlock" next to the "Phone type" drop down
- Follow the instructions [I held 2&5 on the keypad of my phone whilst plugging the USB lead in
- Aerix program will start doing it's business and at the end will say "successful" or something like that.