How can I install Compiler Version 5 for Keil vision 5

Hello, I'm trying to use STM32F411 to control a Wi-Fi module which comes with some sample projects that can be used to learn but the manual uses compiler version 5 to compile them which I don't have it in my Keil vision 5. after I installed Keil MDK it only shows Complier Version 6 and Complier 5 is missing. I have found the link (link for compiler ver 5) for arm website form where we can download the compiler 5 but how do we install it so that we can use it with Keil vision 5.