Ketron's web site shows only v 1.30. I found this this vArrnager thread concerning the SD4 USB issue. https://www.varranger.com/vforum/index.php?topic=209.0

Dan has a MIDI test file to test the SD 4 USB midi connection. V 1.30 does have a USB issue. Dan has done a great job with patch mapping/layering for the SD4.

Now where can I find v 1.32? My SD4 has 1.30. Does that mean I have to update it to 1.31 before 1.32?