diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index f83c31b800..75c11ea6c1 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -1,19 +1,57 @@
-RAWTHERAPEE DEVELOPMENT RELEASE NOTES
--------------------------------------
-
-This is a development version of RawTherapee. We update the code every day, which means the smallest number in the version changes every day, and every few months when new features are finalized and known bugs are fixed we release a stable version. Every minor version in-between those stable versions is known as a "development" version, and this build is one of them.
-
-While we only commit tested and relatively stable code and so the development versions should be fairly stable, you should be aware that:
-- They only had limited testing, so there may be bugs unknown to us.
-- You should report these bugs so they get fixed for the stable release. See www.rawpedia.rawtherapee.com/How_to_write_useful_bug_reports The way tools work in the development versions is likely to change as we tweak and tune them, so your processing profiles may produce different results when used in a future stable versions.
-- Bugs present in the stable versions get fixed, and until a new stable version is released these fixes are present in these development versions, thereby making the development version "more stable" than the previous stable version. At the same time, new features may introduce new bugs :) This is a trade-off you should be aware of.
-
+RAWTHERAPEE 4.2 RELEASE NOTES
+-----------------------------
 In order to use RawTherapee efficiently you should know that:
 - You can scroll all panels using the mouse scroll-wheel.
+- You can right-click on a tool's name to automatically expand it while collapsing all others.
 - To change slider values or drop-down list items with the mouse scroll-wheel, hold the Shift key. This is so that you can safely scroll the panels without accidentally changing a slider or other tool setting.
 - All curves support the Shift and Ctrl keys while dragging a point. Shift+drag makes the point snap to meaningful axes (top, bottom, diagonal, other), while Ctrl+drag makes your mouse movement super-fine for precise point positioning.
 - There are many keyboard shortcuts which make working with RawTherapee much faster and give you greater control, make sure you familiarize yourself with them on RawPedia's Keyboard Shortcuts page!
 
+NEW FEATURES since 4.1
+----------------------
+- RawTherapee-4.2 includes many speed, precision, stability and memory usage optimizations. As such, users of 32-bit operating systems may now find that they can enjoy more stability while using the most memory intensive tools. Of course users of 64-bit systems benefit from this as well. Refer to the full changelog for more information.
+- Powerful color toning tool.
+- Curve control of luminance noise reduction.
+- Median filter in the noise reduction tool.
+- Film simulation tool using Hald CLUT pattern files.
+- Command-line option to define bit depth of output TIFF/PNG file, see --help.
+- Multiple improvements to dead/hot pixel handling, see RawPedia.
+- Filename of currently opened image shown in the titlebar.
+- Clip control for the flat-field correction tool.
+- Demosaic method "Mono" for monochrome cameras, and "None" for no demosaicing.
+- Copy/paste processing profile keyboard shortcuts for right-handed users using Ctrl/Shift-Insert.
+- Update to dcraw 9.22 1.467
+- New or improved support for:
+  - Canon EOS 7D
+  - Canon EOS 7D Mark II
+  - Canon PowerShot G7 X
+  - Canon PowerShot SX60 HS
+  - Fujifilm cameras using the X-Trans sensor
+  - Fujifilm X30
+  - Hasselblad H4D-31
+  - Hasselblad H4D-50
+  - Hasselblad H4D-60
+  - Hasselblad H5D-40
+  - Hasselblad H5D-50c
+  - Mamiya Leaf Credo 40
+  - Mamiya Leaf Credo 50
+  - Mamiya Leaf Credo 60
+  - Mamiya Leaf Credo 80
+  - Monochrome cameras such as Leica Monochrome
+  - Nikon D610
+  - Nikon D700
+  - Nikon D750
+  - Nikon D800E
+  - Nikon D810
+  - Panasonic Lumix DMC-FZ1000
+  - Panasonic Lumix DMC-GM5
+  - Panasonic Lumix DMC-LX100
+  - Phase One IQ250
+  - Phase One P40
+  - Phase One P65+
+  - Sony Alpha ILCE-5100
+  - Sony NEX-C3
+
 Refer to RawPedia for information about RawTherapee's tools and how to use them.
 
 DOCUMENTATION
@@ -45,3 +83,380 @@ REVISION HISTORY
 The complete changelog is available at:
 https://code.google.com/p/rawtherapee/source/list
 
+CHANGELOG for 4.2 since 4.1
+----------------------------------------------------------------------
+  DATE          | CHANGESET     | COMMITTER
+----------------|---------------|-------------------------------------
+> 2014-10-24    | 2fbe8cae6e72  | DrSlony
+  Updated Chinese (Simplified) interface translation on behalf of Jie
+  Luo, issue 2545
+
+> 2014-10-24    | dde50c8e3114  | DrSlony
+  Updated Czech interface translation on behalf of mkyral, issue 2546
+
+> 2014-10-23    | 53ab792dd8fb  | DrSlony
+  Updated splash screen to 4.2
+
+> 2014-10-23    | 3aaaf1782f5b  | DrSlony
+  Update to defaults and re-generated some bundled profiles to make
+  better use of modern tools
+
+> 2014-10-23    | bd4695a31fbb  | Ingo
+  Camconst.json updates, Issue 2348, thanks to Ilias
+
+> 2014-10-22    | 3eeacadd8cb2  | Philip Rinn
+  CACHE_NAME_SUFFIX might be empty for releases.
+
+> 2014-10-22    | 70842f66c10a  | DrSlony
+  Added AppData file for better integration with package managers:
+  rawtherapee.appdata.xml. Issue 2512
+
+> 2014-10-21    | c7e844c705d0  | DrSlony
+  Updated Japanese interface translation on behalf of firefly, issue
+  2541
+
+> 2014-10-21    | 12e53c60e165  | DrSlony
+  Added option to choose output file bit depth 8-bit/16-bit from
+  command-line, see --help. Issue 2525
+
+> 2014-10-20    | 71beb24b5068  | Ingo
+  Removed tiling pattern caused by race conditions in Highlight
+  Reconstruction method Color propagation, Issue 2481
+
+> 2014-10-20    | 95e9f8ea99ef  | Ingo
+  White Balance Blue/Red Equalizer hangs RT or quirks when Method =
+  Auto, Issue 2500
+
+> 2014-10-20    | 9981bb569d9a  | DrSlony
+  Shortened strings used by the Black-and-White tool, issue 2010#c174
+
+> 2014-10-20    | 8bc05dff00dc  | Ingo
+  Speedup for Tone Mapping, Issue 2528
+
+> 2014-10-20    | e2fc9cfe3811  | Ingo
+  Reduce peak memory usage of queue processing, Issue 2527
+
+> 2014-10-19    | f075d3c95b02  | DrSlony
+  Updated Nederlands (Dutch) interface translation file on behalf of
+  wim ter meer, issue 2540
+
+> 2014-10-19    | 6087b3f48c91  | Ingo
+  Fixes a crash in METM when closing an Editor tab while File browser
+  tab is active, no Issue
+
+> 2014-10-18    | aec241a048cb  | Ingo
+  Fixes undefined behaviour in colortemo.cc, no Issue
+
+> 2014-10-17    | 7049ce233713  | DrSlony
+  Regenerated remaining interface language files
+
+> 2014-10-17    | da43298d5bbe  | DrSlony
+  Changed L a b to L* a* b*, issue 2539
+
+> 2014-10-17    | 60daef593b8d  | DrSlony
+  Updated Polish interface translation files, issue 2492
+
+> 2014-10-17    | dcdceb7d7230  | DrSlony
+  Revised default interface language file, issue 2539
+
+> 2014-10-17    | cd664a48337e  | DrSlony
+  Updated Spanish (Espanol) interface translation file on behalf of
+  gerset, issue 2538
+
+> 2014-10-16    | bb28b494c869  | Torger
+  Issue 2456, revert to embedded thumb when profile is removed
+
+> 2014-10-15    | 5b7a39cc964d  | DrSlony
+  Let hot pixel filter work at all zoom levels so Auto Levels works
+  correctly, issue 2535
+
+> 2014-10-12    | d14636783e2f  | Ingo
+  RT shows wrong focal length for Pentax K50, Issue 2533
+
+> 2014-10-10    | 2cd312a0b3d9  | Ingo
+  Added CanonModelID for some Canon cameras to exif database
+
+> 2014-10-09    | 384fc9aa9635  | Ingo
+  Increased precision for Shadows/Highlights (and a small speedup and
+  reduced memory consumption for method 'Sharp mask'), Issue 2523
+
+> 2014-10-04    | 110f68244a62  | Ingo
+  Speedup for Vibrance and Contrast by Detail Levels, Issue 2520
+
+> 2014-10-02    | 8feab83590ce  | Torger
+  Handle Leaf's latest ICC profiles (Leaf Credo 50)
+
+> 2014-10-01    | c6af49cb7028  | Ingo
+  Speedup for thumbnail processing, Issue 2503
+
+> 2014-09-30    | d7ec73fbfb79  | DrSlony
+  Quality control and fixes of interface language files, see issues
+  2506 and 2518
+
+> 2014-09-23    | e1d74ac6fe4d  | Ingo
+  removed OPA outpout, no Issue
+
+> 2014-09-18    | dfbc1be9f817  | Jacques Desmis
+  Color toning - set opacity to linear does not turns color toning off
+  - issue2014
+
+> 2014-09-11    | 0ee975a6965d  | DrSlony
+  Updated Japanese interface translation on behalf of firefly, issue
+  2505, and fixed Polish GENERAL_BEFORE and GENERAL_AFTER, issue 2492
+
+> 2014-09-11    | ce1c4c9f5f76  | DrSlony
+  Updated generateUnusedKeys to handle comments and double-check the
+  code verbosely
+
+> 2014-09-10    | 73c163de35d1  | Ingo
+  Optimization for dark frames and hot/dead pixel
+  detection/interpolation, Issue 2486
+
+> 2014-09-10    | a67738dd51eb  | Ingo
+  RT hangs or crashes after trying to open a corrupted file, Issue
+  2467
+
+> 2014-09-10    | 34066fbd1cd4  | Jacques Desmis
+  Color Toning fixed some bug -auto saturation - Labels - issue2454
+  issue2014
+
+> 2014-09-09    | 3742936850e3  | Ingo
+  Patch from Issue 2406 revoked
+
+> 2014-09-08    | dc5d929bb2b3  | Torger
+  Added Leaf Credo 50
+
+> 2014-09-07    | 250076d19d28  | DrSlony
+  Fixed Median Type tooltip by removing old
+  TP_DIRPYRDENOISE_MET_TOOLTIP entry
+
+> 2014-09-07    | 59a7adf7491d  | DrSlony
+  Updated Default ISO High and Medium.pp3 to use the Luminance curve
+  instead of the Luminance slider, issue 2463
+
+> 2014-09-05    | 73afcbeb4260  | Michael Ezra
+  Filter enhancement: exclusion criteria (issue 2487)
+
+> 2014-09-02    | d082e8492e11  | Jacques Desmis
+  Array out of bound access - Color Toning issue2485 - Thanks Ingo
+
+> 2014-09-01    | c4df874fb469  | Ingo
+  Division by zero in Raw Whitepoint Correction, reported by cppcheck,
+  no Issue
+
+> 2014-08-31    | 1c096febc076  | Ingo
+  Random crashes when using Luminance denoise curve, Issue 2463
+
+> 2014-08-30    | 741440b2f92f  | Hombre
+  Slight code cleanup in simpleprocess.cc (no issue).
+
+> 2014-08-30    | 24c0634edfd3  | Jacques Desmis
+  Luminance Denoise Curve issue2463
+
+> 2014-08-27    | c56348a7f6d2  | Torger
+  Issue 1472: fix so multi-open brings up tabs in same order as in
+  file browser
+
+> 2014-08-26    | d19b07d18758  | Torger
+  Issue 2406: Order the parallel thumbnail loading so it thumbs appear
+  gradually in order, and don't use too many threads (to avoid long
+  stalls).
+
+> 2014-08-26    | 541f105cc855  | Torger
+  Issue 2480: side-stretching of fix-ratio crops now stop at image
+  edges
+
+> 2014-08-25    | 2c98df196adb  | Torger
+  Issue 2471: fix issue with picking out wrong maximum white for
+  multiple white levels
+
+> 2014-08-25    | 928e7d36befe  | Torger
+  Issue 2442 portrait/landscape crop orientation now always short side
+  horizontal/vertical
+
+> 2014-08-25    | 94ef30003c19  | Hombre
+  Fix a warning in clutstore.h
+
+> 2014-08-25    | 99df5256036e  | Hombre
+  Solving issue 2411: "HaldCLUT: Film emulation from G'MIC in
+  RawTherapee"
+
+> 2014-08-20    | 16a2146921d4  | Ingo
+  Broken Dark Frame subtraction when Auto-selection of Dark Frame is
+  enabled, Issue 2472
+
+> 2014-08-19    | cca42b7a3f75  | Torger
+  Fixed P40/P65+ decoding bug (will come in next update of dcraw)
+
+> 2014-08-14    | 6b7e968f0cae  | DrSlony
+  Added missing colon after PREFERENCES_FLATFIELDSDIR
+
+> 2014-08-12    | 0241f989244d  | Ingo
+  Extremely slow filebrowser on Win64, Issue 2431
+
+> 2014-08-11    | 47fc64906375  | DrSlony
+  Updated the text, removed newlines - let the window manage the
+  wrapping.
+
+> 2014-08-08    | 7d2f58bfd294  | Michael Ezra
+  Show filename of currently opened image in titlebar (issue 2450)
+  Thanks for help, Ingo!
+
+> 2014-08-06    | a52afcd42179  | DrSlony
+  Introduced new RELEASE_NOTES.txt for development versions, to be
+  replaced with RELEASE_NOTES_stable.txt when we tag a stable version.
+
+> 2014-08-01    | fb994c7a5c99  | DrSlony
+  Updated Japanese interface translation on behalf of Firefly, issue
+  2459
+
+> 2014-07-28    | 69dded769f90  | Jacques Desmis
+  Fixed - Lab 'a' and 'b' curves are not behaving as expected
+  issue2462
+
+> 2014-07-24    | 2f96f8a34c46  | Jacques Desmis
+  Fixed - refreshing the preview in the Median NR module - issue2014
+  issue2423
+
+> 2014-07-16    | b9cd976da5d9  | DrSlony
+  Updated Japanese and default, and re-generated all language files
+
+> 2014-07-15    | 4e1f374e23de  | Hombre
+  Adding per curve default curve capabilities, used in the Color
+  Toning tool as of now. See issue 2014
+
+> 2014-07-13    | 78a6ef223bc7  | Hombre
+  Solving issue 2451: "Compilation problems on arch. other than
+  x86_64"
+
+> 2014-07-10    | 7d2c1fef0057  | Ingo
+  small changes for FF clip control code to prepare Hombre's upcoming
+  patch, no Issue
+
+> 2014-07-09    | 72e1ff9f3153  | Michael Ezra
+  Enhanced Filters for Flat-Field and Dark-Frame filechoosers (see
+  issue 2440)
+
+> 2014-07-10    | f797918e46d4  | Ingo
+  Support for Fuji X-Trans-Sensor, Issue 2415 (thanks to Hombre for
+  the changes to gui); Clip Control for Flat Field correction, Issue
+  2441; Update to dcraw 9.22 1.467
+
+> 2014-07-09    | eacf79da6d3f  | Ingo
+  Crash when using SETM and F3/F4, Issue 2361
+
+> 2014-07-09    | 6c8ab56a0a64  | Ingo
+  Denoise crashes using high zoom levels, Issue 2434
+
+> 2014-07-09    | feac780ae68b  | DrSlony
+  Issue 2417:Do not install licenses or fonts to ${BINDIR}
+
+> 2014-07-08    | 5e8935770c2d  | DrSlony
+  Polishing Color Toning and Median patches
+
+> 2014-07-07    | 087d615f0710  | Jacques Desmis
+  Improving medians Denoise issue2423
+
+> 2014-07-07    | cb8766844bb9  | Jacques Desmis
+  Color Toning issue2014
+
+> 2014-06-25    | 10f5a41758ce  | Jacques Desmis
+  Additional Median filter for Denoise issue2423
+
+> 2014-06-25    | 82ed8254d381  | Michael Ezra
+  Enable opening two separate files with the same filename (issue 2268
+  - Thanks, Ingo!)
+
+> 2014-06-25    | 40ae142e3a26  | Torger
+  Rerun preprocess when changing to or from mono demosaicer
+
+> 2014-06-22    | fbdd01ee1f79  | Ingo
+  Win64 build crashes opening folder containing MRW files, Issue 2425
+
+> 2014-06-20    | a6607fd58281  | Torger
+  Added support for monochrome cameras (like Leica Monochrome) and IR-
+  modified bayer cameras through new demosaicer "mono"
+
+> 2014-06-20    | 111c20c52b46  | Torger
+  camconst.json: Added Phase One IQ250
+
+> 2014-06-20    | f5fc41637d00  | Torger
+  camconst.json: Added Hasselblad H5D-50c, fixed H5D-40
+
+> 2014-06-18    | 00cbe035d1d9  | Ingo
+  Fix opening HDR DNG with frame and different black/white levels,
+  Issue 2413, kudos to Javier
+
+> 2014-06-18    | 399621fb2eac  | Ingo
+  Profile copy/paste with Ctrl/Shift-Insert, Issue 2418
+
+> 2014-06-17    | da558096e08a  | Ingo
+  Update to dcraw 9.21, Revision 1.463
+
+> 2014-06-14    | ac8a84274647  | Hombre
+  Normalizing line endings to DOS in color.cc
+
+> 2014-06-14    | fa026891d451  | Hombre
+  Adding more possibilities to the ColorProvider class
+
+> 2014-06-12    | f2f2deb79dd6  | Torger
+  Line feed normalization (DOS); added Leaf Credo 40/60/80
+
+> 2014-06-11    | d42f54e063cf  | Ingo
+  Shadows from S/H broken on small JPEG files, Issue 2408
+
+> 2014-06-11    | 741d8d10a99e  | DrSlony
+  Fixed bad spelling of our program name in
+  WindowsEnvironmentSetup.html
+
+> 2014-06-05    | f87962c15a13  | Ingo
+  when demosaic method 'none' is selected, use it for all zoom levels,
+  Issue 2247 comment 7
+
+> 2014-06-04    | 3b8514d56d99  | Ingo
+  Memory leak when applying profile to hdr raw files in filebrowser,
+  Issue 2407
+
+> 2014-06-04    | c91e64a681d4  | Ingo
+  enhanced support for Nikon D610, Issue 2348, comment #33 (Kudos to
+  Ilias)
+
+> 2014-06-03    | 3fab2ca1619a  | Ingo
+  Black output image when using ciecam02 and tone-mapping, Issue 2404
+
+> 2014-05-29    | 26e5a81d4f33  | Michael Ezra
+  Unicode font for Navigtor for windows and 3-rd party license
+  distribution mechanism (issue 2333 comment 41)
+
+> 2014-05-29    | d1cf956728a5  | DrSlony
+  Added gaaned92 to AUTHORS.txt
+
+> 2014-05-26    | 6d86615df142  | Ingo
+  Pentax K-500 DNG Focal Length wrong, Issue 2399
+
+> 2014-05-26    | 320e548d67d7  | Torger
+  More Hasselblad format support updates
+
+> 2014-05-26    | 2f1fcd38a0e2  | Ingo
+  Crash in 'Highlight Reconstruction Colour Propagation', Issue 2360
+
+> 2014-05-26    | c145534d322e  | Ingo
+  Speedup for ciecam, Issue 2350
+
+> 2014-05-25    | eb2ca372d289  | Ingo
+  Segfault closing second detail window before its done rendering,
+  Issue 2395
+
+> 2014-05-24    | 3d509455a442  | Torger
+  Hasselblad identification and color matrix fixes for 31, 50 and 60
+  megapixel backs
+
+> 2014-05-24    | 266cc66e9e5e  | Torger
+  Fixed Hasselblad H4D-60 format parsing (dcraw bug).
+
+> 2014-05-23    | c4962b7a340a  | Ingo
+  Improvement for Auto Distortion correction, Issue 2386
+
+> 2014-05-21    | 58663ff4d991  | DrSlony
+  Added tag 4.1 for changeset 1ab5c210ec1a
+