Thank you for your help Michiel,
I have tried the instructions that you sent, but I am still unable to connect via PuTTY. It says,
"Using username "bitnami".
Server refused our key
I'm still pretty new to this, so I appreciate your patience with me.
Ultimately, I want to be able to edit files using Filezilla, but when I try to upload the edited file, it says that the permission has been rejected. I am unable to change the permissions in Filezilla, because I don't have the permissions to make that change. I logged on using "bitnami" as the user per the instructions for Filezille in the link below. I saw that I would need to log on via PuTTY to change the user permissions? Thanks for your help.