One suggestions would be to have a way to save default settings, so the next time you open the utility those defaults are automatically loaded.
For example:
-save the hashing algorithm you like to use
-save a specific folder, file or drive that you like to
copy to a pre-determined destination. I like to make
copies of files to my NAS or to another portable drive on
a regular basis. Having this config automatically loaded
when staring QuickHash would be very nice.