This is mostly a dependencies upgrade.
Upgraded to Python 3.3.
Upgraded to Qt 5.
Minimum Windows version is now Windows 7 64bit.
Minimum Ubuntu version is now 14.04.
Minimum OS X version is now 10.7 (Lion).
... But with a couple of little improvements.
Overwrite subfolders’ state when setting states in folder dialog (#248)
The error report dialog now brings the user to Github issues.