If you decide to import a Vixen sequence into LSP 2.5. Before you do the import, go into the vixen sequence and make sure that you have only the Entrec DMX USB Pro mapped for use and selected. If you have, for example, the Adjustable Viewer also mapped for use or any other plugin, remove it. Even if it is not checked, If you import a Vixen sequence into LSP 2.5 with more than one plugin listed in use, the sequence will import OK. But, if you try to add the controller to the library, LSP will lock up. At least it locks up on my machine.
Rick S