Quote - Thank you for your quick response.

I don't think as well as you that such a problem is here because the practical use time of this system is long.
I asked it a question because I might trouble many people though I would like to try actually this.

"I, like you, don't think that this problem is here because this system has been in use for a long time.
I asked the question even though I might trouble many people but I would like to actually try this."

Am I understanding you correctly?

Are you wanting to see if you can change the item title (not the the name of the file to be downloaded) without having to re-upload the free item?

If that is the case, it shouldn't be a problem at all.