Stopped working

I used to like this app, but now it will not print when I try to use it with my HP Envy 5660. The app recognizes the printer and will add it to the app, but every time I try to print something it says that it failed. When I choose the option to print photos and then click on my pictures the app freezes and wont continue. I tried uninstalling the app and reinstalling it, but that did not correct the problem. I use this app on my iPod touch five. Hopefully, there is an app update in my future.

Kate Lynn 27 about Printer Pro by Readdle