Neither Trainz Simulator (1) or Trainz Driver will open on my iPad Mini. Previously both were fine but now the opening screen (N3V Games for Trainz & Trainz Driver logo for Driver) appears for a second or two then it goes back to my iPad screen. This started last night 20 Oct but I hadn't used either for a week or more so I don't really know how long it's been like that. Anyone else experiencing this?