I deleted the files as instructed (Pentaho how to avoid useless Karaf 100 seconds timeout)
Delete files:
\classes\kettle-lifecycle-listeners.xml
\classes\kettle-registry-extensions.xml
\lib\org.apache.karaf.*.jar
\system\karaf
, but the "connect" button disappeared. During the experiment, I learned that file \classes\kettle-registry-extensions.xml is responsible for it.
Is it possible to disable KARAF without removing the connect button?