mIRC has had builtin SSL/TLS support since 7.35, any reason why you are downloading external versions?
04/08/2014 - mIRC v7.35
...
11.Updated SSL routines to allow both static and dynamic linking of
OpenSLL with mIRC. mIRC now comes with OpenSSL 1.0.1h linked
statically, so SSL is available without needing external DLLS.
However, if mIRC finds a newer version of OpenSSL on your system,
it will load that automatically.
