A couple of our clients/prospects have reported this error:
Error: Unable to resolve a class for RequiresLicense handler: mx.controls.advancedDataGridClasses:DMVLicenseHandler.
This usually happens when the sdk is missing the datavisualization bits. (Flexicious contains the ExtendedAdvancedDataGrid that pulls in the AdvancedDataGrid).
Up until Flex 3.5, the Flex datavisualization sdk was a seperate download (link below). It needs to be downloaded seperately and extracted on top of the default Flex sdk.
The solution is simple. Go to the following link
http://www.adobe.com/cfusion/entitlement/index.cfm?e=flex3sdk and download:
Adobe Flex 3.5 Data Visualization Components for Flex Builder
Then follow the step by step instructions here:
http://www.webappsolution.com/wordpress/2009/04/22/installing-flex-33-sdk-data-visualization-33-swc/
If you have the datavisualization bits, your build path should look like below:

7e249262-b4f3-469c-82dc-ad95a4f2c351|2|3.5