After I updated to the latest version, Evernote does not start at my system anymore.
I do not know, what exact version, I was running previously, but I usually update regularly (may be 2-3 months ago).
Uninstall, Reinstall, Restart of the system, etc. did not solve the problem.
In Windows Task Manager, I can see, the Evernote task appears after start, but then it just disappears without any further message or UI coming up.
In Windows event log, I also cannot see any error message.
My system is Windows 8.1 (6.3, Build 9600; German).
As a workaround, I did went back to version 10.16.7, which I kept luckily as installation source. I was surprised, that no official download ressources of older versions seems to be available :-(