Hello, Same Problem here. Two machines, both Win7-64. Updated the first from 1.2.91 to 1.3.67, after two hours the second, 1.2.91 to 1.3.67. Some hours later I saw, that, in one share, many files were deleted on both PC's, I'm lucky, they are in .syncarchiv of one of the machines. I have no idea why this happends, all files were on normal hard drives and, as far as I know, they are normal media-files. Best regards Marco