update will not install

I have 3 iOS devices, an iPhone 6+, an iPad mini and an iPad Air. I have tried to update this app on all three devices. It goes through the motions. The progress circle completes, and then the Update button reappears. On the iPhone 6+ I deleted the app, and have tried to re-download and install, to no avail. It again completes the progress circle, but no install takes place. There is a problem with this update. The “Report a Problem” link here goes to a static website with no option for reporting or providing any kind of feedback. I like the program, and have used it for over a year, but this update is either corrupt or flawed.

jacquesboot about L'Ecorché