FWIW - I think Soundforge and Audacity (perhaps in the plug-in package) have "Remove DC Offset" features...
FWIW...WaveLab, Audacity, Audition/CEP, and Samplitude SE all definitely have a "Remove DC Offset" feature. In Audacity, it's in the Normalize function - just untick the
Normalize maximum amplitude to -3 dB checkbox.