On one PC with a few hundred files, SyncDoc completed its sync, and whenever it is restarted it shows the sync is completed, all with a minute or so.
On my other PC, with a few thousand files, sync is never achieved -- even after over 15 hrs and multiple cycles through its Updating and then some Downloading (without actually changing any files that I can see)? A few .docx files are regularly "Merged" even though they have not been opened for over a year. At best, after an Updating and Downloading cycle, I get something like all files have been updated -- but no sync notice as on the other PC.
Version 0.42 on Win7 Ult x64 with GApps Premier Docs