It is my understanding they are only sending them out to lifetime license customers.  Annual License customers still need to pay their annual fee to get the updated license file each year.  Which certainly makes sense.  Kinda defeats the purpose if they send a file good for 30 years to the annual license customers.  

Vicki -
 
There are several posts along this same line in different areas of the forum.  The bottom line is that DBA Software (as a company) is no longer providing anything beyond essential bug fixes to the current platform.  They are devoting their programming resources to their new EziJobs version which may have a lot of good features but is nonetheless a new program with the associated learning curve and potential bugs.  As a lifetime license user, you can get the EziJobs update for free but you will pay the price in training employees in a completely new software, the potential problems transferring data from the current DBA (they have promised a program to transfer data but there has been some discussion whether all historical transaction data will transfer over - yet to be determined...) and if you jump in early, the inevitable bugs inherent in a new software product.
 
IS Tech Support was established in January of 2003 as an alternative for existing DBA customers who prefer to stay with the existing platform and build on it.  We offer program updates and enhancements for a modest charge of $35/month as well as this free user forum and support plans offering unlimited email and phone support for additional charges.  See www.istechsupport.com/guest-plans.asp for additional details.

Laura,
 
As I understand it from Mike, you have essentially forever to make the decision to switch to Ezijobz at no additional cost.
 
As to whether DBA TAS 5.1 version will continue to run?  Well, as Microsoft moves fully into a .NET environment (probably about 2006-2007) you can be almost guaranteed that the current DBA will not run entirely successfully.  Just the way the software world works.