New Features:

• Added option to use Windows' CNG/BCrypt API for key transformations (about 50% faster than the KeePass built-in key transformation code; by increasing the amount of rounds by 50%, you'll get the same waiting time as in 1.15, but the protection against dictionary and guessing attacks is raised by a factor of 1.5; option enabled by default; only Windows Vista and higher).
• Completely new update checking system that now also supports checking for new plugin versions.
• Added warning when trying to open a KDBX file created by KeePass 2.x (with hint about how to migrate from 2.x to 1.x).
• Added 'KeeAutoNewDbBasePath' and 'KeeAutoNewDbBaseName' configuration options (to specify the default location where the database file will be stored in mini mode).
• Added advanced option to immediately delete TAN entries after using them.
• Added '-minimize' command line option.
• Added '-registerfileext' and '-unregisterfileext' command line options to register/unregister the KDB file association.
• File association methods are now UAC aware.
• Added check for reserved group names (like 'Backup').
• On Windows Vista and higher, core database manager error / warning messages are displayed using modern task dialogs.
• The number of days below which entries are treated as soon to expire can now be configured (see help -> customize).
• Plugins: added new COM interface (IKpAPI2) for the main API that allows querying whether the database is the one initially specified on the command line.
• Key provider plugin API: new key query method that supports context information.

Improvements:

• Image list handling improvements.
• When auto-locking after the specified number of seconds of inactivity, KeePass minimizes to taskbar or to tray, depending on the 'Minimize to tray instead of taskbar' option.
• Plugin versions are now displayed in a separate column in the plugins dialog.
• When trying to open a second master key dialog or auto-type entry selection dialog for a window, KeePass brings itself to the foreground instead of showing a second dialog.
• Calculation of soon to expire entries is now more precise.
• Various improvements to status bar messages.
• Improved workspace locking toolbar button tooltips.
• Installer: various minor improvements.
• Various code optimizations.
• Minor other improvements.

Bugfixes:

• Newlines of the notes field are now encoded correctly in exports when Unix mode is enabled.
• New databases do not inherit file names of previous locked databases anymore.