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Simple x264/x265 Launcher version history 
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Version 2.50 [2015-MM-DD]
* Much improved Avisynth and VapourSynth detection code
* Added option to prefer 64-Bit VapourSynth, when available
* Updated x265 to version 1.5+129
 
Version 2.46 [2015-01-31]
* Updated x265 to version 1.4+424
* Updated x264 to revision 2525
* Updated Avs2YUV to version 0.24 (BugMaster's mod 3)
* Proper detection of Windows 10
* Added new Tuning options for x265 encoder

Version 2.44 [2014-11-02]
* Updated x265 to version 1.4
* Updated x264 to revision 2479
* Some improvements to template handling

Version 2.42 [2014-08-16]
* Various installer fixes and improvements

Version 2.41 [2014-08-15]
* Updated x264 and x265 encoders to the latest versions
* Enabled 2-Pass encoding support for x265 encoder
* Added support for VapourSynth r24 (minimum required version is r24 now!)
* Better support for templates saved in program "old" versions