Questions[gprename](ubuntu)

I read I should try to use the one from Trusty but it doesn't work:

[Desktop Entry]
Version=2.6
Name=GPRename
Comment=To rename files and directories in batch
Exec=gprename
Icon=/usr/share/pixmaps/gprename/gprename.png
Terminal=false
Type=Application
Categories=Utility;FileManager;

Name[fr_FR]=GPRename

The icon in HUD won't work. When Launched from terminal I get "Path doesn't exist!". Please help

When I run gprename . I get Permission denied for this folder!