Proper derefs

src/main/java/com/volmit/iris/engine/IrisEngine.java

@@ -420,6 +420,7 @@ public class IrisEngine implements Engine {
         getData().clearLists();
         Iris.service(PreservationSVC.class).dereference();
         Iris.debug("Engine Fully Shutdown!");
+        complex = null;
     }
 
     @Override

src/main/java/com/volmit/iris/engine/framework/Engine.java

@@ -884,6 +884,7 @@ public interface Engine extends DataProvider, Fallible, LootProvider, BlockUpdat
             {
                 return sl.matches(engine, chunk);
             }
+
             return false;
         };
 

src/main/java/com/volmit/iris/engine/platform/BukkitChunkGenerator.java

@@ -234,6 +234,9 @@ public class BukkitChunkGenerator extends ChunkGenerator implements PlatformChun
             }
 
             getEngine().close();
+            folder.clear();
+            populators.clear();
+
         });
     }