Hi,
I have the above problem. I've tried the suggestions of re-installing, deleting AppData etc and it makes no difference.
It's quite annoying and started doing it about 3 weeks ago, I was hoping the latest update would fix it but no!
Its just not remember my username and password when I close.
Please help me! It has to be one of the most annoying pieces of software! If its not that its the problem of syncing etc, arrgghhh!
Thanks
Andy