What software version came with your card? The PDF reviews version 1.2 and states it has some problems that made editing with it less accurate than editing with tape (which certainly doesn't say much for software version 1.2). But at the end of the PDF it says at the end of August 1990, version 2.0 of the software was to have become available.
If you have version 2.0, I guess you could become the first person to write a review of that! :beige: