When I hit this problem a year ago , I thought I was using the "same configuration" but it turned out that I had plugged in an USB drive while using TurboTax to retrieve previous year's tax file; TT was initially intstalled and launched without that USB drive. So while technically my machine was in the same configuration from TT Quit and Hibernation to the next TT session, it's actually a different configuration from the installation and initialization time (no USB drive) to the time I tried to run it again the second time (with USB drive). After I unplugged my USB drive, TurboTax ran without requiring the license key again. Hope that's your issue as it can be worked around. Good luck!
