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Firefox crashes at start-up

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I upgraded from 3.6.23 (which worked great) to 7.0.1 and 7.0.1 crashes immediately. Tried RUN and firefox - safe-mode to no avail.

I upgraded from 3.6.23 (which worked great) to 7.0.1 and 7.0.1 crashes immediately. Tried RUN and firefox - safe-mode to no avail.

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There is a possible connection to ThreatFire from PC Tools (TFWAH.dll in your module list and in thread 1) with that crash signature.

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I disabled ThreatFire and reloaded 7.0.1 and still Ffx crashes. It won't start in safe-mode either.

What now?  Thanks again.