In the past I used to put the jar file for a Generic Database in the folder libext/JDBC, but that folder no longer exist and I'm having trouble connecting to a database using 'Generic database' connection. Where should I put the jar file for the (generic) driver? I get this error:

org.pentaho.di.core.exception.KettleDatabaseException:
Error occured while trying to connect to the database

Driver class 'org.neoj.jdbc.Driver' could not be found, make sure the 'Generic database' driver (jar file) is installed.
org.neoj.jdbc.Driver


at org.pentaho.di.core.database.Database.normalConnect(Database.java:415)
at org.pentaho.di.core.database.Database.connect(Database.java:353)
at org.pentaho.di.core.database.Database.connect(Database.java:306)
at org.pentaho.di.core.database.Database.connect(Database.java:294)

Any suggestion is greatly appreciated.

Thanks,
Jules