Let me start this thread off by saying sorry if there is a thread like this or its in the wrong section. Anyways, whenever I use TinyUmbrella I get an error saying "No JVM could be found on your system. Please define EXE4J_JAVA_HOME to point to an installed 32 bit JDK or JRE or download a JRE from www.java.com". I am currently running Windows 7 x64 Bit. Please help me as this is the only thing preventing me from downgrading from iOS 4.0!