Please follow the below steps to connect Postgres database from remote PC using PgAdmin tool.

Stop the server and perform the steps.
1. Go to the location C:\\ManageEngine\\SupportCenter\\pgsql\\data, edit the file postgresql.conf and make the below changes.
change #listen_addresses = 'localhost' to listen_addresses = '*' and save the file.
2. From the same location C:\\ManageEngine\\SupportCenter\\pgsql\\data, edit the file pg_hba.conf and make the below changes.
# IPv4 local connections:
host    all             all             127.0.0.1/32            trust
From the above parameter, change 127.0.0.1/32 to 0.0.0.0/0 and save the file.
3. Start the server.

Note : In attached screen shot  scp is installed in ' scp-k12r2-1 ' machine. ' pgadmin '  is installed in ' scp-w2k8r2-1 '
           machine.