Hello everyone,
Posting our most recent finding regarding the crash-to-desktop problem, thanks to Roboloid.
It turns out that the problem is with the Steampipe beta game updates.
>> To fix the problem of Synergy not being able to open properly, you must disable the Steampipe betas for the Steam client, Half-Life 2, Episode 1 and Episode 2.
You may also need to restart Steam after changing them.
That should do it.
Or, you can try the lazy man fix: Add the "-dxlevel 89" launch option to Synergy.
If you encounter further issues, let us know!