How To: Transfer your PuTTY settings between computers
Quoting what Grant Robertson said in the article and that I share with him:
“PuTTY is tops on the short list of applications I install first on any Windows machine. Over the years I’ve used PuTTY, I’ve installed it on a huge number of computers but I’ve always had one complaint; There isn’t a configuration file I can backup or move to a new machine.”
In case you don’t know what PuTTY is:
“PuTTY is a free software SSH, Telnet, rlogin, and raw TCP client“.- Quoted from Wikipedia


