Unable to start PDI CE 7.1 in windows 8.1

Hi,

I'm trying to use PDI CE 7.1 but the spoon is not starting. I'm using windows 8.1 and Java 1.8 64-bit also I have set JAVA_HOME and JRE_HOME in system variables.
I'm not getting any errors or java exceptions but the spoon UI is not coming up

Following is the configuration


F:\pdi-ce-7.1.0.0-12\data-integration>Spoon.bat
DEBUG: Using PENTAHO_JAVA_HOME
DEBUG: _PENTAHO_JAVA_HOME=C:\Program Files\Java\jdk1.8.0_45
DEBUG: _PENTAHO_JAVA=C:\Program Files\Java\jdk1.8.0_45\bin\javaw.exe


F:\pdi-ce-7.1.0.0-12\data-integration>start "Spoon" "C:\Program Files\Java\jdk1.
8.0_45\bin\javaw.exe" "-Xms1024m" "-Xmx2048" "-XX:MaxPermSize=256m" "-Dhttps.pr
otocols=TLSv1,TLSv1.1,TLSv1.2" "-Djava.library.path=libswt\win64" "-DKETTLE_HOME
=" "-DKETTLE_REPOSITORY=" "-DKETTLE_USER=" "-DKETTLE_PASSWORD=" "-DKETTLE_PLUGIN
_PACKAGES=" "-DKETTLE_LOG_SIZE_LIMIT=" "-DKETTLE_JNDI_ROOT=" -jar launcher\penta
ho-application-launcher-7.1.0.0-12.jar -lib ..\libswt\win64

Any Suggestions?

Thanks!