No Slo-Mo support??

I downloaded this app SPECIFICALLY so I could use it to put together some slo-mo vids I shot on my iPhone 6s, but when I put them on there, they dont play in slo-mo, then when I saved the video, it didnt play in slo-mo either??? This app is $13 which is expensive for a app, so why is their no slo-mo support?

billy duf boy about Pinnacle Studio Pro, v5.6.1