The current default setting for the Transposition was a general consensus request from about 3 or so years ago.
If you need to have it display differently, you can easily make the adjustment by going to House Styles > Edit Instruments, find and select the Bass Guitar within the VDL Template 6.0b Ensemble > Timpani, Rhythm & Steel Family > Bass Guitar, then click the Edit Instrument button.
From there, adjust the octave(s) in the Transposition area to suit your preferences. (See attached image.)