I upgraded from Vista to Windows 7 (64 bit) and now when I load HEM, I get the error "The following error occurred when trying to open the database: Failed to establish a connection to '127.0.0.1'". I have turned on administrative permission for all the programs, as well as disabling UAC. I have also activated secondary login and it hasn't made a difference. If I was to reinstall postgresql or HEM, would I lose my whole database? What else can I try? Thanks.