Except the regular bug fixes, the Audacity version 2.4.2 provides following prominent new features and functionalities.
MP3 exports and imports without padding
Audacity now supports LAME’s gapless playback info, allowing MP3s to be exported and imported without additional padding.
Other applications that support the LAME tag, for example audio player applications, will be able to read MP3 files exported by Audacity without the padding.
A new command has been added to the Tools menu: Tools > Reset Configuration.
This resets your Audacity configuration, preferences, export settings and toolbars, to default settings.
User presets in Effects, Generators and Analyzers are left untouched, as are any Macros you may have created and plug-ins.
Audacity is a free, cross-platform, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, Linux. You can download Audacity new version here.