Update to Worklight version 6.0. Even load sample apps from new version 6.0 web site and get this exception like this:
An internal error occurred during: "Upgrade Worklight Projects". loader constraint violation: when resolving method "org.apache.commons.io.FileUtils.iterateFiles(Ljava/io/File;Lorg/apache/commons/io/filefilter/IOFileFilter;Lorg/apache/commons/io/filefilter/IOFileFilter;)Ljava/util/Iterator;" the class loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) of the current class, com/worklight/builder/skins/impl/SkinBuilderImpl, and the class loader (instance of org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader) for resolved class, org/apache/commons/io/FileUtils, have different Class objects for the type org/apache/commons/io/filefilter/IOFileFilter used in the signature
None of the apps could be built and deployed in new 6.0 (Tried With JDK 1.6/1.7, Eclipse 4.2.2).