Combine Exported Datasets within Google Sheets (SPARKvue)

How do I combine runs exported from SPARKvue into a single Google Docs spreadsheet file?

Learn how to export data from SPARKvue to a tab-delimited text file here:
youtu.be/vLp6QSvdBBc

Learn how to export data from the SPARK Science Learning System to a tab-delimited text file here:
youtu.be/GThasSc9L2w

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