Would you mind expanding on your comment about "an enhanced security model"? I've been looking fairly hard for details on this, and can't find anything. Curious to see in what way the model may have changed before upgrading...

I'm rather disappointed by the new version. 'Selective sync' in particular is rather ugly with the file extensions used. And there is still no real access control or user management. For a single user, it remains a great, in an enterprise environment, not soo much, AeroFS is probably a better choice for such use. On the other hand, BTSync has still the strength that you can sync any folder and not just folders within a pre-defined main folder (like AeroFS or Dropbox).

The Synology version is disappointing too: It's not a signed (and therefore trusted) package but a manual install of an unsigned package, so without automatic updates. I didn't get it to work, it got stuck after I had entered the key of another BTSync client … in addition, a server version is still not available for OS X, i.e., only logged in users can use BTSync.

@kOoLiNuS: It's 10 folders including all sub-folders.

Did you get the Pro or what? I'm a little perplexed by the “10 folder” limit for free users. Ad I've read on their comments I do hope the limit means sharing-keys…