Worked for me! I dropped a bunch of .HEIC files in and it output them all as .JPG files in the same folder that my PC recognizes and can open. This is a major life saver after so much headache dealing with apples file transfer issues!
LOL! What a waste! This app doesn't open HEIC files like it claims! It spits out a warning: "Some files were not recognized as valid HEIC files." Well then, if my HEIC photo files from my iPhone 8 aren't "HEIC", then what is?