MBM 3.X users:

  I recommend you uninstall all previous version 
  of MBM before you install 4.04

MBM 4.01 and 4.02 users:

  Nothing should change regarding your custom settings
  except for the resource readout (9X only), by default
  this will be turned off now, you can turn it back on, on 
  the resource tab

MBM 4.03 users:
  
  Nothing will be changed, you only have the option to lower
  the interval time of the interval log to 6 seconds

Alex