Where did you install Band In a Box to? What location?

You should have installed it to the top level of the desired drive, e.g. C:\bb\ (which is the default location)

Try uninstalling and reinstalling to C:\bb

Perhaps review this video first:






BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones