Default URL handler works for ssh1 and ssh2 url's, not for ssh

[renep]

I'm managing Linux VPS's in a cloud, and the web interface of the cloud provider has a convenient button tot open an ssh session to a VPS using a link like:

ssh://user@111.222.111.222/

I would like that button to launch SecureCRT.

In the Global options of SecureCRT, category Terminal > Web Browser, I found these two buttons:

1. SSH2: Make SecureCRT your default SSH2 application
2. SSH1: Make SecureCRT your default SSH1 application

These buttons work fine for ssh1: and ssh2: url's.

Unfortunately, a plain ssh url without the protocol version number doesn't work. Why is there no button for ssh?

How do I manually create an association with the ssh protocol? What are the registry keys I need to create/edit?

I'm using SecureCRT 7.2.4 on Windows 7.