Hello. I’ve also had the app freeze up on a few separate occasions when trying to “add layer from photos”. I can’t seem to reproduce the steps that cause this action, and like Nighternet, it also seems to be random. After closing and re-opening the app, I can click “add layer from photos” again and it works. I have an iPad Pro 1st generation, iOS 11.2 and using Artstudio Pro 1.0.6.