Is it possible to make GoArrow ignore Town Network for route calculation?

I play on DT and TN is the worst place to go as a newb. It's almost alyways guaranteed VP and loss of DIs

With all the Town Gems and Appartment Portals, it's still quite easy to travel almost anywhere. Only problem is I don't know all the routes, just a couple to the places I visit frequently.

Do a search for a route and click on one of the links that lead to TN. On the next screen hit ctr + click the delete button. Do this until all of the links to TN are gone. It will probably take a while

 

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I just found this again: http://dl.dropbox.com/u/6604527/Updates.html

I was at that site the first time I installed GoArrow and updated my location file from there(that was like 70 days ago), but didn't realize there is a non TN version.
Also, I already found an error in this location database. I tried to route to Al-Arqas (yes I know there are portal gems, just wanted to try it), and it said to take the Al-Arqas portal in Shoushi. But there is no such portal in Shoushi.

Is there anyway to update that information and submit it to the guy who maintains this files? Who maintains it anyways?