How can I delete (move, copy, rename) a file?

Application: 

Since 1.3.
Long-tap on a file and use cut and paste option in the context action bar (CAB) following the new Android design guidelines.

Until 1.2

Long-tap on a file. Press and hold the file until the context menu appears. This opens a context menu with the commands "Move", "Copy", "Rename", "Delete", and other possible commands.

Since 1.3.Long-tap on a file and use cut and paste option in the context action bar (CAB) following the new Android design guidelines.Until 1.2Long-tap on a file. Press and hold the file until the context menu appears. This opens a context menu with the commands "Move", "Copy", "Rename", "Delete", and other possible commands.

Comments

How to update the application?

An old version FileManager applation is pre-installed on my phone. It is installed as a system app. I deleted the FileManager.apk from /system/app directory, but I can't install the new version. How to deal with this case ?