X-notifier doesn't work now with new computer for Yahoo email

I just purchased a new computer and I had to re-enter my information to set-up the x-notifier extension (Chrome) for alerts from Yahoo email, as the information was not saved from before. For some reason it will not save my user name or password when I click on save. It just re-sets itself, and when I click on the yahoo page, it is still blank?  I have not been contacted by the manager in response to this problem, and have not found a way to re-set my account. If anyone knows how to fix this it would be appreciated.