After upgrading to Ubuntu 9.10 I've got 2 istances of Postgres DB on my system: a running 8.4 on port 5433 and the original 8.3 from old distribution stopped on port 5432.

I tryed to change preferences on 8.4 to set the default port, but nothing works.

How can I remove 8.3 and make the 8.4 version the only server on my system and make it run on port 5432?

Thanks in advance.