Sage Timeslips

Need to import a Timeslips 2007 database into newly installed Timeslips 2020. Do not need much of the old data, but do need last several years of data. Is there a way to export the 2007 data and edit it before importing it to 2020?

I'm trying to use TSImport to add some new client/matters to Timeslips. I've got all the fields mapped and I can see the data. However, when I try to import it fails with no explanation. I'm wondering if there are some 'have to' fields Timeslips needs…