To use the fernflower decompiler, just put the fernflower.jar file into the runtime/bin folder. Only tested with fernflower 0.8.6, other versions may fail. Hi Searge, I was told you might be planning to distribute Fernflower as a part of MCP. It looks like a very nice project to me (excellent work btw :)) so I'm happy to allow the integration. Below you'll find the necessary supplement to the general license. Based on the general Fernflower license the following additional permissions are granted to the project Minecraft Coder Pack (MCP). As long as the project remains non-commercial it may use, integrate and distribute every binary version of the decompiler Fernflower in any desired way as part of MCP tools. Custom patches to Fernflower are generally possible after a brief consultation with me. Cheers, Stiver Fernflower Freeware License 1.0 This license applies to the Fernflower decompiler (hereafter “Software") including any associated files, information and examples. You are hereby granted a non-exclusive and non-transferable license to use and distribute the Software in binary form according to the following terms and conditions. 1) Copies and Redistribution You may copy and distribute unmodified binary copies of the Software provided that you keep this license intact. You must NOT charge money or fees for the Software except to cover the absolutely necessary distribution costs. Any other form of redistribution is prohibited. Especially you are not allowed to redistribute the Software as part of any other software collection or other product. 2) Use You may use the Software "as is" in any commercial or non-commercial environment for any purpose. 3) Contact Information The sole author and owner of Fernflower is Stiver. Address all correspondence regarding this license to: fernflower.decompiler@gmail.com http://www.reversed-java.com 4) Disclaimer of Warranty THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.