Place Update_WillyD_from_037_to_038.command to same directory where game is and run it from there. Things will happen automatically you just need to comfirm to overwrite files and after some time when all update is done to press finish and then your Willy D 0.38 will be updated to Willy d 0.39 It may take several minutes for this to happen just be patient. Please leave comment or message me with some feedback how it worked for you guys thank you in advance :)
Amiga789