Dear Team,
Thanks for the export version in the Data Viewer tool, In the beta version, the only problem encountered when Sync is that, you can't export data immediately after sync, if you do so, error :
Encountered a sharing violation while accessing files XXXX.csdb pop up.
Thanks for reporting the problem. We will fix in the next release. In the meantime, if you close and reopen DataViewer after syncing, the export should work.