The free version typically doesn't require a manual key during installation; it is built into the "Free for Home/School" installer.
Instead of looking for a key that may be expired or from an untrustworthy source, 1. Upgrade to the Latest Free Version xshell-5-full-license-key
You might find websites claiming to offer "full license keys" or "cracks" for Xshell 5. I strongly recommend avoiding these for several reasons: The free version typically doesn't require a manual
A more modern, cross-platform SSH client with a slick UI and cloud syncing (free version available). I strongly recommend avoiding these for several reasons:
If you are a student or teacher, you can often get the professional versions of many tools for free by using your .edu email address. Xshell 5 Free Licensing Discontinued
If the current version of Xshell doesn't fit your needs, there are several industry-standard alternatives that are completely free and open-source: The classic, lightweight choice for Windows.
A powerful tool that includes an X11 server, tabbed SSH client, and network tools in one package (the Home Edition is free).