Hi, even though Putty is installed I am unable to see the option to add it. 

Hello,
We've replaced it with something better (SSH Shell) and have hidden putty, you can still elect to use it though. Simply enable display of the deprecated entry types.
Best regards,
Maurice
2019-03-20_16-46-41.png
Unfortunately I am unable to use the default SSH client due to requirements for ED25519 keys. Thanks!