Here is the information about the Trellian annual Engine Definitions Subscription.

The Engine Definitions update service includes all of the following:

The Trellian SEO mission statement is to provide its customers with the latest Search Engines Tools. To do this we have a team of experts who are constantly adding new engine definitions, updating existing engine definitions and also checking the search engines algorithms. As the Search Engine providers can modify their search engines algorithms, meaning that they can modify the way they rank web pages and the way you can submit to them. For this reason, Trellian updates on a daily basis all of the search engine definitions stored in the SubmitWolf database.

As this requires a lot of time and resources, search engine updates cannot be offered for free.

SubmitWolf and SEOToolkit for Business include the first 12 months free of charge for the search engine updates and program updates. After that, you will need to register for the following:
=> SEOToolkit Enterprise Edition: Complete update service for 12 months: $295
=> SEOToolkit Standard Edition: Complete update service for 12 months: $149
=> SubmitWolf Submission Tool: Complete update service for 12 months: $99.95

With Trellian's update service you will always get up-to-date results and you will always have access to the latest tools for search engine optimization.

You can update your subscription here: http://trellian.com/renew.htm

Here are 5 reasons why Trellian SEO software will save you time and money.

Save money, time, resources and technical marketing knowledge.
The Trellian software is like most software, it is developed to save the end user time and money.
It is also developed to centralize many marketing resources in the one place.

Any one submission that you carry out manually will take from 5 to 10 minutes on average.
Let's use 5 minutes to calculate 200 submissions for any one website, including the time needed to find each new search engine website.
You will be looking at approximately 16 to 20 hours for just "ONE" website. SubmitWolf for example can manage up to 5 different websites and will automatically submit one website to over 200 search websites in approximately 10 minutes.

Low cost
Professional SEO software such as Trellian comes with a price, but if you consider how much you would pay for one hours work with a Web Agency you won't go far. The Trellian SEO software costs less than one hours work with a web agency and look at what you get!

Support
Not forgetting all the free customer support and marketing advice.

Independance
Also with the Trellian SEO software, you will be independent and you will use exactly the same software that the Web Agencies use.