I just updated to Windows 10 and Logos will not open. The error message is entitled "WerFault.exe" and it reads "Memory could not be read."2514.Logos Log Files.zip
There are no log files for Windows 10, and this not simple to resolve after a quick look around the web. The simplest approach comes from this web site.
See http://winaero.com/blog/how-to-access-recovery-and-troubleshooting-options-via-reboot-in-windows-10/ to get into Safe Mode.
If this is too difficult then you should contact Faithlife Technical Support who can access your computer remotely.