A new beta build is available at: http://www.toadworld.com/Downloads/ToadforDataAnalysis/tabid/186/Default.aspx .
Toad for Data Analysis Beta build 644 fixes the issue of overwriting custom settings when running multiple copies of the beta simultaneously. This first appeared in Toad for Data Analysis Beta build 625. Thanks to the community for helping identify the problem.
A list of other fixes and enhancements can be found in the release notes: http://www.toadsoft.com/tda/ToadforDataAnalysisRNv2.0Beta.htm .
The next beta build will be scheduled for June 30th, 2008.
Quest Software, Inc.