This article describes how to import data from MTPuTTY.
For that you'll need to:
Export the data from MTPuTTY through 'Server > Export tree'.
Convert the exported file into an ssh config file (see below).
After importing from MTPuTTY you might want to import from PuTTY.​
$PSDefaultParameterValues['Out-File:Encoding'] = 'utf8'[xml]$content = Get-Content .\mtputty.xml$content.Servers.Putty | Select-Xml -Xpath '//Node[@Type="1"]' | Select-Object -ExpandProperty 'node' | %{'Host {0}' -f $_.DisplayName' Port {0}' -f $_.Port' User {0}' -f $_.Username' Hostname {0}' -f $_.ServerName}>ssh_config
Substitute '.\mtputty.xml' with the location of the file created by MTPuTTY.