winscp crashes toggling hidden files

WinSCP 4.2.7
i open my server, show and then hide hidden files&folders then click on root in the tree-view and winscp freezes. tested on 2 Windows7 computers and 1 XP computer and it happens on all 3. waited for 5 minutes and it still didnt un-freeze. i took a video of it happening and posted it. you can preview in low quality or download in high quality if you want
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Can you send me an email, so I can send you back a debug version of WinSCP to track the problem? Please include link back to this topic in your email. Also note in this topic that you have sent the email. Thanks.

This bug has been added to tracker.