Ok, at first when I clicked file I saw several files that said trash/filename, making me think I was in the wrong place.
I then tried clicking the document looking icon with the plus sign, just to the right of the search button. At which point I could browse to the bandhelper folder.
Can't really read the full name of the files in this view, meaning I can't see if it's mp3 or mid, or something else. but I did find one and seleceted it. was offered a dialog window to replace the file, rename or cancel. After choosing replace it did work.
I did find on the ipad where could delete the recently deleted files. It was just confusing to me at first and I thought I was in the wrong place.
Getting closer to understanding. Will ask more questions soon I'm sure.