(Thanks to SimonTheBeetle for this)
SOLUTION :
Use only the first 10 characters of your original password.
Done and no more headache! Hope you all find it helpful. Cheers.
Which is a stupid solution, but what the hay..
And while I'm at it, the forum Search function is not available unless you're logged in so try googling "wgt invalid login" instead to find a forum post that has the solution...
//E