When I scan something to my computer using my scanner and then go to scan docs and try and email..by default the Thunderbird program comes up and ask for a password which I no longer have and don't know to find or create a new one...problem number 1 and problem number 2 how to I keep Thunderbird from being my default program instead of say Yahoo to email my scanned docs? The only way I can email any of my docs is Thunderbird