This tool is complicated, if you are one of those who appears the error: "An unknown system error has occurred. If this problem persists, leave us your comments", this is because you do not have the spreadsheet open in your main account (to use the tool you must be in your main account)
you have to use the cell selector, if you try to write the cell names it will throw you another error. Finally, yes, it is slower than Microsoft Excel tool, but it works :)
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