how to upgrade

install new version as seperate cluster

https://www.postgresql.org/download/windows/

stop both servers

 - find the data dir
 postgres=# show data_directory; data_directory
     
 - use pg_ctrl to stop both clusters 
    pg_ctl -D "data dir" stop -m fast
    
http://blog.shernshiou.com/upgrading-from-postgresql-9-1-to-9-3/
    
I solved it by changing both pg_hba.conf (9.1 and 9.3) to use no password.

local all postgres trust