That is the correct file. In fact, you are absolutely right, the .dll itself has the version 1.8.7.3. So that is normal.
The version number that we are interested in is listed in the user interface of the Sforzando (when you view it in Band-in-a-Box) - click on the Settings button and it's in the lower left corner.

I wonder if when you select the HiQ instrument manually, you are clicking on an item that has "Sampletank" in it's name. Double-check that you are clicking on one with Sforzando.


Andrew
PG Music Inc.