If you have Pro, you should already have them, 'check your plugin list under PreSonus in Studio One 5 Pro' You would have had them in v4 as well, if you had Pro, and most likely earlier, can't quite recall, . They gave them an update and a new coat of paint for v5.
To use them in another DAW you need to have PreSonus Hub installed and do the dance with that. Same like it was to get the Fat Channel stuff to work with other DAWs I guess.
I have never installed or used PreSonus Hub myself, so I'm not sure of the procedure, but I'm sure it isn't to difficult.
I don't use any other DAW, I only use Studio one, so I don't need to have PreSonus Hub installed, and of course I have no need for the plugs to work in another DAW.