If your computer recently installed a Windows update, Windows likely discretely changed the Windows Audio Control Center sampling rate to 48Khz while the Band-in-a-Box audio sampling rate remained at 44.1Khz. There are at least two ways to verify the settings. Here's one.

One way to verify audio settings (See screen shot):
1) Ctrl+E opens BiaB Preferences
2) Select Audio button to open BiaB audio settings
3) Select Audio Drivers button to open the Windows Audio Drivers device audio settings. (Note this window is device specific so your window will look different from mine).
4) Compare audio settings.

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BiaB & Windows Audio Settings

Jim Fogle - 2024 BiaB (1111) RB (5) Ultra+ PAK
DAWs: Cakewalk by BandLab (CbB) - Standalone: Zoom MRS-8
Laptop: i3 Win 10, 8GB ram 500GB HDD
Desktop: i7 Win 11, 12GB ram 256GB SSD, 4 TB HDD
Music at: https://fogle622.wix.com/fogle622-audio-home