I find a solution: I deleted folder: C:\Documents and Settings\Administrador\Datos de programa\postgresql
and query tool open again -- View this message in context: http://postgresql.1045698.n5.nabble.com/Query-tool-not-open-tp4925093p4931739.html Sent from the PostgreSQL - pgadmin support mailing list archive at Nabble.com. -- Sent via pgadmin-support mailing list (pgadmin-support@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgadmin-support