First Setup doesn't work

Hello there, I'm new on MCreator, and tried to install it, I tried like 6 times already, searching for solutions online, but many were outdated and didn't work; now I'd like you to help me out figuring what's wrong in here and what I should do:

   
Executing gradle command: cleanCache clean setupDecompWorkspace --refresh-dependencies
Microsoft Windows [Versione 10.0.15063]
(c) 2017 Microsoft Corporation. Tutti i diritti sono riservati.
C:\Pylo\MCreator175>cd forge
C:\Pylo\MCreator175\forge>SET "JAVA_HOME=C:\Pylo\MCreator175\jdk64\"
C:\Pylo\MCreator175\forge>SET JAVA_EXE=%JAVA_HOME%\bin\java.exe
C:\Pylo\MCreator175\forge>SET PATH=%JAVA_HOME%\bin\;%PATH%
C:\Pylo\MCreator175\forge>gradlew -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" cleanCache clean setupDecompWorkspace --refresh-dependencies 
This mapping 'snapshot_20161220' was designed for MC 1.11! Use at your own peril.
#################################################
         ForgeGradle 2.2-SNAPSHOT-eb2e450        
  https://github.com/MinecraftForge/ForgeGradle  
#################################################
               Powered by MCP unknown               
             http://modcoderpack.com             
         by: Searge, ProfMobius, Fesh0r,         
         R4wk, ZeuX, IngisKahn, bspkrs           
#################################################
:cleanCache
:clean UP-TO-DATE
:deobfCompileDummyTask
:deobfProvidedDummyTask
:getVersionJson
:extractUserdev
:extractDependencyATs SKIPPED
:extractMcpData
:extractMcpMappings
:genSrgs
:downloadClient
:downloadServer
:splitServerJar
:mergeJars
:deobfMcSRG
Applying SpecialSource...
Applying Exceptor...
Exception in thread "main" java.lang.OutOfMemoryError: GC overhead limit exceeded
   at java.lang.String.substring(String.java:1969)
   at java.lang.String.subSequence(String.java:2003)
   at java.util.regex.Pattern.split(Pattern.java:1233)
   at java.lang.String.split(String.java:2380)
   at java.lang.String.split(String.java:2422)
   at org.jetbrains.java.decompiler.struct.consts.LinkConstant.resolveDescriptor(LinkConstant.java:139)
   at org.jetbrains.java.decompiler.struct.consts.LinkConstant.initConstant(LinkConstant.java:130)
   at org.jetbrains.java.decompiler.struct.consts.LinkConstant.resolveConstant(LinkConstant.java:94)
   at org.jetbrains.java.decompiler.struct.consts.ConstantPool.(ConstantPool.java:102)
:decompileMc FAILED
   at org.jetbrains.java.decompiler.struct.StructClass.(S   at org.jetbrains.java.decompiler.struct.StructClass.(StructClass.java:75)
tructClass.java:87)
   at org.jetbrains.java.decompiler.struct.StructContext.addArchive(StructContext.java:167)
   at org.jetbrains.java.decompiler.struct.StructContext.addSpace(StructContext.java:100)
   at org.jetbrains.java.decompiler.struct.StructContext.addSpace(StructContext.java:78)
   at org.jetbrains.java.decompiler.main.decompiler.BaseDecompiler.addSpace(BaseDecompiler.java:36)
   at net.minecraftforge.gradle.tasks.fernflower.FernFlowerInvoker.runFernFlower(FernFlowerInvoker.java:68)
   at net.minecraftforge.gradle.tasks.fernflower.FernFlowerInvoker.main(FernFlowerInvoker.java:41)
Picked up _JAVA_OPTIONS: -Xmx1200m
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':decompileMc'.
> Process 'command 'C:\Pylo\MCreator175\jdk64\bin\java.exe'' finished with non-zero exit value 1
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 4 mins 57.368 secs
Picked up _JAVA_OPTIONS: -Xmx1200m
C:\Pylo\MCreator175\forge>
Task completed with return code 0 in 306179 milliseconds