@skiman101 puzzling indeed, what is the last entry when running from commandline?
The app needs .NET Framework 4.6 or later, and VC++ Redist 2015, 2013 and 2012 (no java)
Perhaps you can try installing/repairing the VC Redists:
Hi, apologies for the delay. Is it possible that you used a BETA version of Sync before?
It seems like a database corruption issue.
It should be fixed once you delete C:\users{username}\appdata\local\SIX networks\Sync and C:\users{username}\appdata\roaming\SIX Networks\Sync