Keeps crashing – Room Planner Home Design Review

I loveeeeed this app. Can't tell you how many hours I've spent just messing around and creating floor plans or used it to rearrange furniture in existing rooms in my house. Worked awesome on my iPhone 6 no issues ever. But then in June I got an iPhone 7 and I literally can't make a single plan. App crashes every time I save (which defeats the whole point of paying for premium) and distorts the rest of the rooms I wish I could insert pictures to show what happens. No help from tech support.
Review by ex-die hard user on Room Planner Home Design.