One (perpetual) license can activate a Magix application on two (2) PCs simultaneously. You can deactivate one of two devices however and re-activate it on an alternate PC. OTOH, the '365' subscription versions can only be activated on one (1) device at a time.
Whatever the current Platinum version is I just upgraded. I mostly only use Vegas Pro 19 but that's on my main machine in the studio. I wanted to play around with movie studio on my upstairs computer and my surface. I just clicked on video and this is where the comment popped up. Thanks again!