My suggestion though: next upgrade, allow us to drag and drop files we want to merge - that would speed things up. This porgram is great for a simple merge or split.
The first was totally free, but when you dragged and dropped the files you wanted to merge, the order would be in reverse, I found a work-around, but there was always ONE file that I had to move by hand to the top. This is my second little app I downloaded from the APP Store. Normally, I don’t bother to write a review, but I will this time.