I haven't been following this thread too closely, but have you tried
renaming the profile directory? I'm guessing something in there is
corrupt, causing the hang.
On XP it's:
C:\Documents and Settings\[your_username_here]\.gimp-2.6
(Could also be .gimp-2.7)
I'd rename that (".gimp-2.6-backup") and restart gimp. See what happens.
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