Overwrite could cause issues with the database. ais always better to cancel the previous . exe and database prior copying the newcones into the directory.
I'm not sure if you're the same person, but I've read this so many times now.
What exactly do you mean when you say "cancel the previous files"? There's no process running that could get canceled, unless you run Aurora during the update, then obviously it won't work. You can't "cancel" a file.
Also, replacing the existing files with new ones can't cause any issues since the files are, well, replaced. Unless the new files are already corrupted or get corrupted during the transfer, but this could also happen if there was nothing to overwrite.