For that, you could first make sure that your MicroFour StrataFrame AddIns.dll and MicroFour StrataFrame Extensibility.dll assemblies are present in the GAC and are the proper version, and do a search on your machine to ensure there isn't a different version sitting out there that visual studio might be grabbing instead.
If you have not updated yet, make sure you have downloaded the lastest version and more importantly let it update the SF database. When I reinstalled and had the installation update the SF database, it fixed the problem.
Could this be associated with the other post that Trent is working on for me where the listview's PopulateDataSourceSettings is failing?
Jeff