[ubuntu] Filezilla and 13.10 will not open.

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http://ubuntuforums.org – 13.10 will not open filezilla onto the screen. The icon comes up in the Top Left-hand corner and the option to quit is there. As an alternative, 'Bare FTP' works but is not as good. My 13.04 machine and Filezilla work well. Any suggestions Please. Graham. (Hardware)