Thank you Henrik. Here is the powershell script I came up with:
#comment
#$DebugPreference="Stop"
#Write-Verbose
Stop-Service -Name "NetcamStudio.Service"
#set password that will be used in ncs config files. Note double quotes are used one place and single quotes the other
# <add key="WebServerCertificatePass" value="'%3$@yP,[K/vQ'" />
$PlainTextPass = '%3$@yP,[K/vQ'
$pfxpass = $PlainTextPass |ConvertTo-SecureString -AsPlainText -Force
& "C:\Program Files\Git\mingw64\bin\openssl.exe" pkcs12 -export -in C:\Certbot\live\1234.no-ip.biz\fullchain.pem -inkey C:\Certbot\live\1234.no-ip.biz\privkey.pem -out D:\batch\fullchain1.pfx -passout pass:$PlainTextPass
Copy-Item "D:\batch\fullchain1.pfx" -Destination "C:\Program Files\Netcam Studio - 64-bit\fullchain1.pfx"
Import-PfxCertificate -FilePath D:\batch\fullchain1.pfx -CertStoreLocation Cert:\LocalMachine\My -Password $pfxpass
Start-Service -Name "NetcamStudio.Service"
#Write-Output "Press any key to continue ..."
#$host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown") | Out-Null