If you look at the zip, you will see that there are a lot more files, if only those are extracted, you have either wrong settings in your winzip (or winrar or whatever you use) or a corrupted zip. But, if it was a corrupted zip, your software should give you an error message, so i suppose that you are NOT exctracting all files.
Tip:

Double click the zip icon, this should open a dialog box where you can see all the files included. Keeping it open, open Computer Resources, and browse to the folder where you want to store the ABVFP files. AT this point, having both of them open, simply drag and drop the files from the zip dialog box to the folder window. This has the same effect as extracting.

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