For anyone still dealing with this, here's what ultimately worked for me: I went into my x86 Programs File and deleted the TurboTax folder. Note that you must do this EVEN if you've uninstalled TTX. Even after a complete uninstall, a remnant folder still sits in the x86 Programs File. Something either hidden in this remnant folder or just the existence of the folder itself was causing the update feature to hang-up. I am running Windows 10. Steps:
1. If you can, make sure any TTX 1040 & State returns are saved someplace (e.g., My Documents).
2. Uninstall TTX.
3. On your c: drive, find x86 Programs folder and delete "TurboTax" folder.
4. Re-install TTX. (It won't count as another user count as long as its the same computer).
5. I was able to open TTX immediately, but you may need to reboot.
Once I did this, TTX worked great and carried over my 2018 stuff into 2019 just fine. Good luck!
