How do I use an ATMOS VST3 plugin to create height channels

[Tracer93]

Hey guys ... A lot has happened in last couple of years. We now have VST/VST3 plugins that can create atmos height channels.
I use Sound Forge or Adobe Audition to create 5.1 from stereo. I have a 5.1.2 sound system.
I use an Sony AVR with AR speakers [front, subwoofer & the height speakers are the AR PL100 Ultra Slim] & Pioneer tower speakers for my back surrounds. Sounds great.
But ... I want to learn how to open up a video or wav file that has 5.1 channels and use a VST3 plugin to create the height channels
and then export it out and ... use the Adobe Media Encoder ... to create a mp4 or mkv video file with ATMOS sound.
This is my idea ... my plan.
I've got some Christmas home videos that I'm going to upmix to 5.1. And I can do that with Sound Forge and Adobe Audition.
But ... I think I need to use Nuendo or Cubase or Davinci Resolve ... or PreSonus Studio One 6 to create the height channels using a VST3 plugin.
But ... I need to figure out which one will do the job nice and simple and ... easy perhaps.
I know it can be done ... the YouTube videos show it happening. But these instructors ... start in the middle.
I need to see a file with 5.1 already in it and just add some ATMOS height channels to spice up the video.
And create a video with ATMOS .... 5.1.2
Come on ... show us how so we can make some really memorable home videos of our Halloween Parties by upmixing our
simple 2 channel stereo to >> 5.1.2 .... I can do the 5.1 ... but I need help creating the >> .2 part.
I'd like to try and use VST3 plugins to create the height channels. Sound Forge & Adobe Audition can't create Atmos height channels.
They can load the plugins ... WAVDSP WDUpMix ... this plugin seems interesting. I'd like to try it.
... but I think I need to use Nuendo or Cubase or Davinci Resolve ... or PreSonus Studio One 6.
Thank you ...