Share your experience!
Some applications have stopped working after upgrading to (Android 4.4.4)
where it appears to me the phrase "unfortunately, has stepped"
For example, an application (Realplayer)
Is it stored on external SD?
I always like to perform a system repair not a factory reset after an update/upgrade as i find it fixes and eliminates any issues
Do not. Stored on the internal memory of the phone
You could try to reinstall the app,maybe it was a simple compatibility issue.If not,as Thommo suggested,perform a software repair.