from the user manual:
Notice: Here you can define where the to-be-created image file (*.mds) is going to be saved on the HDD. Click on â€œNew Folderâ€ to create a new folder on the HDD. Alcohol 120% will memorize the folder for the next time you create another image file.
Hint: If this is the first time you use Alcohol 120%/Alcohol 52%, create a new folder on your local drive for Alcohol 120%/Alcohol 52% Image Files, for example "Alcohol 120%/Alcohol 52% Images". Assign useful names to your Image Files, so that you will be able to tell the difference at a later point in time and it will be easier to find the Image files that Alcohol 120%/Alcohol 52% created. Remember not to keep too many Image Files, the space on your local drive is limited............
are you using the latest version of alcohol? i just tested this again and it worked perfectly.
edit - sorry, i missed your last post for some reason. the user manual has just been updated so i wasn't sure these instructions were included. if you're like me you like an option page for defining file locations so you know where they will always be. sometimes with other applications i will choose a different location knowing the default i set will be there again next time. i'll mention this option as a possible improvement.