The source code, as well as OSX and Windows installers, are available from the github repository.
For Ubuntu users, the updated packages are available from the Highly Explosive PPA.
Updated archives for Arch Linux are also available from the github repository.
This new version includes several new features and improvements:
The list of available RAW demosaicing methods now includes the LMMSE algorithm, ported from RawTherapee. LMMSE is in many cases the optimal choice for noisy and/or high-ISO images.
Added new impulse noise reduction tool, based on the equivalent tool from RawTherapee
Added new perspective correction tool, based on the "keystone perspective correction" from Darktable.
A reset button is now available to restore the tools parameters to their default values