Visual MODFLOW Flex v.2012.1 update
Since the release of Visual MODFLOW Flex in early May SWS has been working non-stop to further improve the software and address the defects that were found and reported by the VMOD community. A new build of Visual MODFLOW Flex is now available that contains numerous updates and improvements.
Visual MODFLOW Flex Interface
Recent additions to Visual MODFLOW Flex include cell-based editing for most of the boundary conditions, statistics for the charts, a simplified engine manager, and options to edit attributes for numerical boundary conditions.
Full list of improvements: 
PDF
Visual MODFLOW Classic Interface
Various improvements were also made to the Visual MODFLOW Classic interface. Defects related to SEAWAT simulations, importing initial concentrations for large models and the multi-node well (MNW) package have been addressed.
Full list of improvements: PDF
Update
If you have a license of Visual MODFLOW Flex, the new build can be accessed from within software the next time you start the software, you will receive a notice of the updates through the Automatic Notification feature.
groundwater model