This article refers to ProcessRobot version 2017 and older, WinAutomation version 7 and older - latest versions support TLS1.2.

Both ProcessRobot and WinAutomation currently support SSL 3.0 and TLS 1.0.

To globally modify the available cryptographic protocols for all .Net applications (versions 4 and above) (like ProcessRobot and WinAutomation), just enable 'strong cryptography' on the Windows registry. 

If strong cryptography is disabled, only SSL 3.0 and TLS 1.0 will be used for secure connections. Otherwise TLS 1.0, TLS 1.1 and TLS 1.2 will be used.

If you want to make sure strong cryptography is enabled, just run the following PowerShell script with elevated privileges.

# set strong cryptography on 64 bit .Net Framework (version 4 and above)
Set-ItemProperty -Path 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\.NetFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord

# set strong cryptography on 32 bit .Net Framework (version 4 and above)
Set-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\.NetFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord

For more information, you can check this link.