Installed on my Xperia Go (running CM11 - Kitkat)
Program starts, select a photo via Album (OK), select decoration stamp (OK), click OK and get dumped back to it's start screen (the sketch board thing).
Moved it to /system/app, flushed dalvik, start it up (OK), choose photo via Album (OK) and then it says 'unfortunately, photo editor has stopped' - not even as far as running it as a user app.
Now I know it's CM11 but I do run the Album, Movies and Walkman apps that someone had modified so I had really hoped this would work.
My phone: Sony Xperia Go (ST27i/Lotus) Rooted/CWM
stock 4.1.2 CM11 Kitkat 4.4.2 with Xposed installer
Remember - a little knowledge is a dangerous thing. And I'm lethal !!!