BitTorrent Sync 2.3.1

What's new in this version:

Changes:
- Nested folder now cannot be added in Selective Sync mode

Fixes:
- Windows 10 reports Sync binary signature is invalid
- QNAP loses identity after upgrade to 2.3
- Sync crashes on Synology after upgrade
- Sync crashes on exit
- Sync crashes due to memory leak in certain cases
- Localization issues
- Sync corrupts the path of folder located in network after restart
- Sync only gets 10 items when user selects many in Finder (fix is only for OS X 10.11)
- Trial license is not replaced with Pro sometimes
- Minor cosmetic issues
- Several performance-related issues
- Sync does not display images on buttons sometimes
- Special symbols in folder pack may cause files to stop syncing
- Files not synced in folder located on SMB share for some file types