Hello Julitsc,
Sorry for my delay getting back to you. Very poor of me.
If you've not managed to change your password yet, click the arrow next to your user name at the top-right of the messageboard and select "USER CONTROL PANEL"...
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Click the PROFILE TAB, and then EDIT ACCOUNT SETTINGS...
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Finally fill out the three password fields, and click SUBMIT.
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I hope this helps.