I'm sorry to hear that you're having problems with Traffic Travis. Our developers have released a new update with a fix to some issues. Upgrading to the latest version might solve your problems.
The latest version is Version 4.1.0.4762 (13 August 2012).
If you continue to have problems, it's possible that one of your database is broken. Can you please open your projects folder and see if you have any broken database? To get the database/s of your project/s please open TTV4 and click on the Help > Open DB folder.
If you find any "broken" file, please delete the project so that Traffic Travis would work. However, Please be aware that you will lose all your data on the project that you would delete. Any removed or deleted project cannot be recovered.
Again, I apologize for this inconvenience and I ask for your kind understanding.
In case you still have further concern or inquiry, please do not hesitate to send us an email or a PM. You may contact support at TrafficTravis.
Regards,
Michelle
Customer Support
Traffic Travis