The version that is converted will vary based on the cPanel version that you are using.

Some FTP clients are unable to use the PuTTy_user-Key-File-3 version. You will see it in the first line when you convert the key (as per the screenshot below). NOTE: If you have converted the key to PPK format using cPanel make sure to review the PuTTy-User-Key-File version that it has been converted to. Next, you need to create your connection profile. First, you need to attach your private key file to FileZilla. The next step is creating your SFTP profile in your FileZilla application. If you already created keys for SSH access, you will use the same keys for SFTP. If you haven’t done this, you can find the instructions in the following article SSH access for Resellers and Shared Servers. The first step is creating your public and private keys. SFTP, different than FTP access, doesn’t use the normal cPanel login to access your account. Below is our guide on using FileZilla and connecting to SFTP for shared accounts. We recently added Secure FTP (SFTP) to our Shared plans.

Filezilla server setup sftp 2015