Don't think you can get your existing Password back
If you go to top of Topics List (on the left)
and click on 'My Profile'
Then click on 'Edit My Profile'
Scan down list of options and there is a small 'Change my Password' option
where you can set a new one.
Unfortunately, to reset your password you will have to remember your original one first.
You could email the Ed, maybe you could get some clues?
(Bottom of the page "Contact us")
G'day Stuey.
Lots of browsers offer to "save password, username", some sites offer "keep me logged in".
I usually select these options coz I forget :-/.
Trying to then login in on a different machine requires all the info I have forgotten.