1. After the installation of BIAS Amp, please go to “Windows/ProgramFiles/VSTPlugins” and copy the file ”BIAS Amp_x64.dll”.
2.Paste the file “BIAS Amp_x64.dll” to “Windows/Program Files/Acoustica Mixcraft 7/VST/3rd Party”.
3.Add an audio track and select FX button to insert BIAS Amp in Mixcraft 7.
*Please note that you need to arm the track and enable the “Monitor Incoming Audio” button to monitor the processed signal from BIAS Amp. 
** If you're using BIAS Amp 32-bit version, please always install the Mixcraft 7 32-bit version to avoid any known errors.
***Check out the link below to know more about how to record in Mixcraft 7.