[Changed files replaced by old ones from another machine]

.SyncTrash folder

There are no hidden folders.

System time is set to be automatically syncronized with time.windows.com and the timezones are same.

Maybe it happens because I generated a new secret key for this folder, then found the old key in IM history and added the folder with old key.

[Changed files replaced by old ones from another machine]

Main machine Win7x64 laptop

Backup machine WinXP desktop

Sync is to synchonize CAD library data files with the backup.

Once the shared folder defined on the desktop disappeared from the Sync's list of 'Shared folders'. This morning I discovered this, re-added the folder and got a message some about folder's 'ownership'. After sync I found my yesterday library work on the laptop has been lost and replaced by old files from backup machine.

How can I avoid it?

Should there be a dialog to resolve file conflicts?