Daniel,There should not be an issue with the installation of the new package. As long as StrataFrame was removed, you should be in good shape. Before installing the new setup, you can verify that the following business objects are no longer registered in the GAC.
MicroFour StrataFrame AddIngs
MicroFour StrataFrame Base
MicroFour StrataFrame Business
MicroFour StrataFrame DBEngine
MicroFour StrataFrame Extensibility
MicroFour StrataFrame UI
To remove the entries (after StrataFrame has been uninstalled) simply select the item and press the delete key. The MicroFour StrataFrame License can be left in the GAC. In fact, it will not let you manually delete it anyway.
You should now be ready to load the new install. This should get you going. Let me know if you have any questions.