Hi everyone,
If you have uninstalled widemail and are missing your subject column but cannot retrieve it because a reinstall of widemail will crash mail you just need to trash the widemail preferences located at:
~/Library/Preferences/com.daneharnett.widemail.plist
This will allow you to reinstall widemail and run it once (it will crash again on 2nd launch), so you can re-enable the subject column and remove widemail again.
We are currently working on a solution to this problem however i believe the problem is in sparkle.framework which may mean we have to remove the auto-update mechanism until we can figure it out.
Cheers
Dane
WideMail Developer