First ensure that you are connected to a VE Pro 5 server.
In the tracks with your audio, you need to instantiate VE Pro Audio Input as an effect. then you get the server window where you select the instance and the channel you like for that instance of VE Pro. In VE Pro, you need to instantiate an Audio Input, the microphone icon, and select the channel corresponding with your choice earlier as that channel's input. You can insert MIR Pro there or send to another channel strip with it inserted, depending on your idea. There is the option of automatically adding MIR to each new channel as well.