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[DrByte]

Correct me if I'm wrong, but isn't a "database" a collection of inter-related files making up the records describing the products?

No, not really. At least not in this context.
A MySQL database is NOT a casual self-managed simple low-end "database" like MS Access or some flat-text-file with which you might be more familiar. This is far more efficient and secure than those other approaches.

It would then stand to reason that these files are kept somewhere.

On a strictly technical sense, yes there are "files" which store the data, but those files are managed entirely by the MySQL database engine running on your server, and those files are NOT accessible to you yourself, nor to Zen Cart.

All I'm asking is where does Zen Cart keep them?

Again, Zen Cart has NO control over those physical "files".
Instead, Zen Cart simply logs into the database engine which takes care of looking up and supplying any requested data and updating/inserting any data as directed by you while using the Zen Cart application.

[geotnt]

Thanks for teaching me a little something. I had seen mySQL databases before, but they were flat-text-files. Or, at least they were able to be made so by the program driving them.

In any event, your suggested approach worked. I found one extra .php file and one mislocated one. Once I moved the mislocated one to its proper place and renamed the extra one to .php1, all seems to be working well.

Now I can try to figure out the original problem, which may or may not have anything to do with ZC. When using either TInyMCE, or HTMLarea to edit store items, any icon I click on opens a window with the sites index page. I'm thinking its outside of the ZC realm, as it behaved the same with a fresh install of ZC.

Again, thanks for your help!!