-You should normally leave this at the default, \q{2 only}. The older
-SSH-1 protocol is no longer developed, has many known cryptographic
-weaknesses, and is generally not considered to be secure. If you
-permit use of SSH-1 by selecting \q{2} instead of \q{2 only}, an
-active attacker can force downgrade to SSH-1 even if the server
-you're connecting to supports SSH-2.
-
-PuTTY's protocol 1 implementation is provided mainly for
-compatibility, and is no longer being enhanced.
+PuTTY will not automatically fall back to the other version of the
+protocol if the server turns out not to match your selection here;
+instead, it will put up an error message and abort the connection.
+This prevents an active attacker downgrading an intended SSH-2
+connection to SSH-1.