File Chooser Unresponsive on Claws Mail

I have a newly installed Ubuntu 14.04 system.

I created an IMAP4 account using Claws Email for a GMail account which I have. I want to change the default folders for the trash, sent, and drafts folders. So, I go to configuration -> Edit Accounts -> [Select IMAP4 (SSL) Account for my GMail - It is the only account] -> Edit -> Advanced -> Click on Sent -> Browse. Now a Dialog opens with the title "Select folder". The dialog is unresponsive. I click on the folders, the Cancel button, the Ok button, the (X) button on the top left to close the dialog ... and for all actions there is no response. I found that if I press ESC a few times t will close all the dialogs and allow me to use the program. I am able to manually type in the folder address and it works fine.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: claws-mail 3.9.3-1ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-37.49~14.04.1-generic 3.16.7-ckt9
Uname: Linux 3.16.0-37-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.10
Architecture: amd64
CurrentDesktop: Unity
Date: Tue May 5 12:00:23 2015
ExecutablePath: /usr/bin/claws-mail
InstallationDate: Installed on 2015-05-04 (0 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: claws-mail
UpgradeStatus: No upgrade log present (probably fresh install)