Very Unhappy After Buying Pro Version

I’m not sure what the issue is. Am running 10.10.3. Is Collageit 3 Pro not supported in 10.10.3? When I select a template I can upload photos ok, but then placing them in the template is awful. They do not swap easily into another place on collage, if I click to remove photo the template text disappears first where that photo resides, resizing (cropping) is time-consuming to make photos fit, adjusting photos manually is difficult, period. It seems to me I used the free version a while back more easily than this.

Frizzylee about CollageIt 3 Pro