I see this is a thread from 2010, I only noticed it yet.

I have this configuration(ttnavigator.bif) :

Code:
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I tried application 7.910 (ttnavigator), this does not work. Until now the latest maps (890.4234) works fine. 895 also I think (version .4444), must give it a try.

I don't think there is still some upgrading or finetuning available. But You never known.
Someone have suggestions ?