>I think, some of the authors may change their e-mail addresses or even interests (say, they worked with VFP, but now doing comics) or even died since publication of the files... :(

Yes, but those emails are tied to the account. So, for those who updated it, it should work. For the rest, outdated emails still happen. And, for the others, yes, some do do something else during these days.

>I've got e-mail from Renoir and responded with a new version of one of my files.

Thanks