Hello, With tstunnel.exe installed with stunnel-5.70-win64-installer.exe, `tstunnel -help', `tstunnel -options` and `tstunnel -version` output gabases. The issue doesn't happen with either stunnel 5.70 on Unix or tstunnel.exe installed with stunnel-5.69-win64-installer.exe. Regards. --- Yasuhiro Kimura