Hmm. Now doesn't have the quotation mark at the end, so that was not the problem.
I didn't notice before, there are many errors here:
2015-05-04 17:20:26,579 DEBUG [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] - Running command: haxe -main ApplicationMain -cp "C:/Program Files (x86)/Stencyl/plaf/haxe/lib/openfl/openfl" -D openfl=2.2.4 -cp "C:/Program Files (x86)/Stencyl/plaf/haxe/lib/lime/lime" -D lime=2.0.6 -cp "C:/Program Files (x86)/Stencyl/plaf/haxe/lib/actuate/1,7,2" -D actuate=1.7.2 -cp "C:/Program Files (x86)/Stencyl/plaf/haxe/lib/console/1,00" -D console -cp "C:/Program Files (x86)/Stencyl/plaf/haxe/lib/polygonal-ds/1,4,1" -D polygonal-ds=1.4.1 -cp "C:/Program Files (x86)/Stencyl/plaf/haxe/lib/polygonal-printf/1,0,0-beta" -D polygonal-printf=1.0.0-beta -cp "C:/Program Files (x86)/Stencyl/plaf/haxe/lib/box2d/1,2,0" -D box2d=1.2.0 -cp "C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00" -D stencyl -cp Source -cp "C:\Program Files (x86)\Stencyl\plaf\haxe\extensions/gestures" -D lime-openal -D tools=2.0.6 -D flash-use-stage -D no-compilation -D lime-opengl -D openfl-flash -D lime-curl -D web --remap nme:openfl -D network-sandbox -D as3_native -D swf-directblit -swf-lib mochi.swf -swf-lib newgrounds.swf -swf-lib cpmstar.swf -resource Assets/graphics/preloader-bg.png@preloader-bg -resource Assets/graphics/preloader-badge.png@preloader-badge -swf-lib Export/flash/obj/assets.swf -swf-version 11 -swf Export/flash/bin/test.swf -cp Export/flash/haxe -debug
2015-05-04 17:20:29,434 INFO [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00/com/stencyl/io/SpriteReader.hx:412: characters 11-23 : box2D.common.math.B2Vec2 has no field winding
2015-05-04 17:20:29,434 INFO [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00/com/stencyl/models/Actor.hx:2224: characters 10-22 : box2D.dynamics.B2Body has no field groupID
2015-05-04 17:20:29,435 INFO [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00/com/stencyl/io/ActorTypeReader.hx:50: characters 2-18 : box2D.dynamics.B2BodyDef has no field friction
2015-05-04 17:20:29,435 INFO [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00/com/stencyl/io/ActorTypeReader.hx:51: characters 2-20 : box2D.dynamics.B2BodyDef has no field bounciness
2015-05-04 17:20:29,435 INFO [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00/com/stencyl/io/ActorTypeReader.hx:52: characters 2-14 : box2D.dynamics.B2BodyDef has no field mass
2015-05-04 17:20:29,435 INFO [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00/com/stencyl/io/ActorTypeReader.hx:53: characters 2-15 : box2D.dynamics.B2BodyDef has no field aMass
2015-05-04 17:20:29,435 INFO [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00/com/stencyl/io/ActorTypeReader.hx:59: characters 2-23 : box2D.dynamics.B2BodyDef has no field ignoreGravity
2015-05-04 17:20:29,435 INFO [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00/com/stencyl/io/ActorTypeReader.hx:67: characters 27-48 : box2D.dynamics.B2BodyDef has no field ignoreGravity
2015-05-04 17:20:29,436 INFO [Thread-12] stencyl.sw.util.StreamGobbler: [openfl.bat] C:/Program Files (x86)/Stencyl/plaf/haxe/lib/stencyl/1,00/com/stencyl/models/Actor.hx:543: characters 4-31 : Cannot access private field m_continuousPhysics
...
They all point to Box2D. Did you maybe install a Box2D manually (in Stencyl's haxe lib repository)?