I just thought I would provide a quick piece of feedback after (finally) trying FlexJS setup for the first time. I set up on Windows 10 to use with Intellij using guides such as the one in the wiki [1] .
I struggled with an initial compile of Hello World because of an error: unable to open 'D:\FLEXSDKS\FlexJS_Nightly\frameworks\mx-manifest.xml' I tried using 0.6.0 release instead of nightly and encountered the same problem. In the end I copied that single file that was reported missing (mx-manifest.xml) from a separate regular Flex SDK and put it into the FlexJS frameworks directory. This was all I needed to do to get the build and debug step working from my IDE. I just thought I would report this.... the cause may be IDE specific...I am unsure. 1. https://cwiki.apache.org/confluence/display/FLEX/Using+FlexJS+with+IntelliJ+IDEA