Does KeePass remember the passwords I used before I installed KeePass? In other words do my old passwords work, if I uninstall KeePass? The reason why I may want to uninstall KeePass is I guess I am paranoid about not having enough control when using a password manager! Is there any reason to be? Thank you!
Nothing happens to old passwords until you change them.
Put the old passwords in KeePass and nothing will have changed.
When you are happy with KeePass, use it to change / create new passwords. If you are not happy with KeePass, un-install it and go back to your manual method - I bet you never go back. :)