As you may know, iFunbox and iExplorer are great tools to SSH content into your iPhone, with limited functionality if your device is not jailbroken.
As of iOS 8.3 beta 2 (8.2 betas have not been tested) this functionality seems to have been limited further to only be able to access files from applications that share documents (musicjunkie, garageband, etc). You can no longer access the apps plist files.
We will keep you updated if this is only a seed bug, or if Apple has really blocked SSH on non-jailbroken devices.

By kito0920