App freezes and crashes

After the new charts update I have issues using it on my ipad. I have latest ipad and latest iOS. When I select different pinned charts the app becomes unresponsive very quickly. Most of the time it crashes after all. Tried on another ipad, same story. This new chart update almost unusable for me on ios.
Another issue I cannot unpin charts. They just stuck till I select new flight.

Cannot help with your first issue but as far as unpinning charts, have you unsynched with current flight? Having done that press the orange edit button in the lower right hand corner. Thereafter you should be able to unpin unwanted charts.