:/opt/openfire/bin# rm -rf /root/.install4j
:/opt/openfire/bin# ./openfire
testing JVM in /usr ...
testing JVM in /usr/lib/jvm/java-1.6.0-openjdk/jre ...
No suitable Java Virtual Machine could be found on your system.
The version of the JVM must be at least 1.5.
Please define INSTALL4J_JAVA_HOME to point to a suitable JVM.
You can also try to delete the JVM cache file /root/.install4j
:/opt/openfire/bin#