"Rapidminer Java error mac os x."

Hello,

I'm trying to install rapid miner 64-bit on my macbook pro, but I keep getting an error saying:


However, I'm very certain I installed the right version of Java. Other people also had this problem on other MacBooks (air).


Is this a bug in Rapidminer in combination with OS X version 10.9.1, or am I doing something wrong?

Regards,
Michiel.

Edit: version 7.45 gives the same error. I figured there is maybe an older version installed as well, but how can I know? I already removed the java plugin file and reinstalled it many times.