Hi, I'm a Japanese user of Thunderbird on my MacBook Pro mid-2010, OSX 10.9.4 Japanese language edition. After I updated the Thunderbird, very often it only shows a tab named "Home" and no folders appear in the Folder Pane, the left end column of the window, just a big huge blank. I rebooted my Mac several times and only a couple of times I successfully were able to see and use the folders that I created and read the e-mails inside just like I was able to before updating. All the other times, it fails to show folders, and I can't read any e-mails inside them. Even after I succeeded in showing the folders, when I relaunched the Thunderbird it fails again. I did nothing but relaunching the Thunderbird and rebooting the Mac, no other settings I've done ever since I updated to Ver.31.0. Under this condition it's virtually impossible to use the Thunderbird. Help me Obi-Wan Kenobi, you're my only help.