Bernice: Probably some maintenance prog erased your password memory for the site, or a windows update causing a little mayhem. Why I have a book for all the sites, games and such. And a USB stick for backing up photos and my Ark evolved game save. Lost months of play thanks to my phone charging via USB cable while windows was updating. Couldn't even use a restore.
Just set it to remember all as you use to.
btw if you use a USB stick to back up or transfer stuff. Remember to "Eject it". Makes sure windows has done all data transfers, else it could have put such on hold while it does other stuff. Saves getting corrupt files