MERMAID has a helpful R package for accessing and importing your data.
Although Excel or similar programs work for basic analyses, for larger datasets or more sophisticated analyses, many scientists use programs like R. mermaidr is an R package specifically for working with MERMAID data, and enables you to access your data from MERMAID, compile datasets from multiple MERMAID projects, and ingest new data into MERMAID.
For more information and detailed instructions on usage, please visit the package website. A helpful list of package functions can be found here. An example of using the mermaidr package for analysis is demonstrated here.