How can I upgrade ESP32 Core

How can I upgrade to
Arduino Release v2.0.14 based on ESP-IDF v4.4.6
I try
platform = espressif32@2.0.14
or
platform = espressif32@4.4.6
I get
unknownPackageError: Could not find the package with ‘espressif32 @ 2.0.14’ requirements for your system ‘windows_amd64’
even when I try
platform = espressif32@4.4.5
I get the same error
V 4.4.5 is the actual Core

 const  char * Buffer;
  Buffer = new (std::nothrow) char [100];
  Serial.begin(115200);
  Serial.println("*******************************************");
   Buffer = EspTest.getSdkVersion();  
   Serial.println(Buffer);
   Serial.println("*******************************************");

Per https://github.com/platformio/platform-espressif32/releases, @6.5.0.