Success! Looks like we've fixed this one. According to our records the fix was applied for
a bug in our system
a recent build.
store onJsonstoreBeforeSync(options,options) bug
When you add the event listener for onJsonstoreBeforeSync it add parameters (options,options) when it should be (options, eOpts). at least in the Mac version it does I havent checked the PC version.
Thanks for the bug report. I can confirm that this is broken in 2.1.x (current public release).
It is fixed in Architect 2.2.x which will be released in the near future.