If you would like to backup your presets, please backup the following folders:
BIAS FX 2
Documents/PositiveGrid/BIAS_FX2
BIAS Amp 2
Documents/PositiveGrid/BIAS_Amp2
BIAS FX 1
Documents/BIAS_FX
BIAS Pedal
Documents/BIAS_Pedal
If you would like to restore your presets, please copy/paste the backup folders above to Documents to replace the current BIAS_FX, BIAS_Amp2 and BIAS_Pedal folders.