Hello. We have moved from SW version 2012 to 2016 and now find that the Custom Properties tab is missing from WIndows Explorer for any newly written or overwritten 2016 files. The information should still be available in WE according to the 2016 Help files, but it isn't in our set-up. Is this a known bug? We use this functionality a lot with DSOFILE.dll and our old VB6 software and this is going to cause real problems for us.  I understand there is a Solidworks Document Manager API, is this something I have to use? Thanks.