As we know, SecureCRT can use public/private key pairs generated by OpenSSH, and puttygen could export to an OpenSSH key…
Hypothesis, we got public/private key pairs generates by puttygen: pub.ppk / pri.ppk
run puttygen and export private key (pri.ppk) )via the "Export OpenSSH key" in puttygen’s "Conversions" menu.
name the new private key "Identity", also name pub.ppk "Identity.pub"
run SecureCRT — Tools — Create Public Key…
no need to change the name "Identity", it is used to be covered
and make the keys be the default globel keys.
copy the keys Identity and Identity.pub (just exported from puttygen, the OpenSSH keys) to the folder which contiained SecureCRT’s private and public key ,( just generated by SecureCRT), and cover them.
MUST put private key and public key in the same folder.