Would adding the ability to "Insert a row" make the program more user friendly? What do you think?

It is not clear for us, what do you mean. From one side you can use import tool where you can import the file which consists of only one collectible. From another side, CollectionStudio has rather user friendly collectible Edit dialog, which allows you modify all collectible characteristics...

I didn't mean the program user friendly; I have used a few and its the best by far collecting banknotes is not easy you do not find them in sequence it may take years before you find the note you need to add to you collection. But I would like to stay or find the correct spot when entered that why I suggested "Insert a Row" if there some way to exactly where you want it to be regardless when it is added I will be happy to use it Tanx