That's really weird. toolbox-sca-0.5.0.jar is in that folder right? Everything should be right there. it's very strange that it couldn't find it. You could try also running it manually with

java -jar toolbox-sca-0.5.0.jar pq_rules.rule

which is basically what the batch file does. Sorry you are having these problems, I've tested this quite extensively, so I really hope I didn't miss something.