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What exactly do you want to achieve? If it's a matter of a small error on your part from poking around and seeing what is what and just wanting to ge3t a better feel for things, we might be able to walk you through whatever steps are needed to fix something if it's broken.
It might just be easier to re-upload the install directory and run the installation script again, it's only a matter of minutes and may prove to be less painfull then you think.
Other options available to you are to do an SQL table dump and import of new table data from your \html\install\sql folder. Depending on your level of experience, this option may be less appealing to you.