The enterprise db bundle installs pgAdmin in addition to the PostgreSQL server itself. Although you may have uninstalled the client pgAdmin, the database server is still running and listening for connections on port 5432. You want to uninstall PostgreSQL before installing the newer bundle.
If this doesn't make sense, think of pgAdmin as a web browser like Chrome or Firefox. Web browsers allows you to view web pages served by web servers, and pgAdmin allows you to view database data from a database server. What actually serves a web page is a web server. What actually serves database data is a database server. The bundle you installed includes both client (browser) and server. If you know you don't need the server, you can safely uninstall it. The pgAdmin client is separate software, and it will continue to run just fine.
and download PGadmin3 there so that i could connect with AWS where the DB is hosted. But like an idiot I downloaded 9.1 not 9.5. I need 9.5 to access fully what we are doing. So I removed the 9.1 that I initially installed, and tried to download 9.5, but 9.5 won't connect to port 5432, I think because 9.1 is already there.
I have scoured the internet looking for ways to "completely uninstall" PGadmin3 but have not been able to make head or tail of the instructions - I tried making a locate db to find particular files but that didn't work.
seems to work for this guy, but I could not figure it out.
I tried simply restarting, that did not work. This can't be that intractable a problem. Any help that folks on this list might be able to give opening up port 5432 would be much appreciated.