Code editor with key authentication

I have been using Dreamweaver for many years simply because it has a built in FTP manager. This makes working on a website very efficient.

The code editor isn't all that great but I manage with it ok.

However I now have a problem in that Dreamweaver does not support key authentication on any of it's versions.

I am having to access a website that will only allow access using a key, passwords are off limits.

I have had a look around and there doesn't seem to be a solution.