The export should be from the website, not from the software.
I found an old screenshot of the same page, and it used to have a second section below "Export Data" and above "Excel Spreadsheets" that looked like this:
The following option provides you with the data file necessary for importing entries into TRPC/TRIEPC.
Export Entries (TRPC/TRIEPC Import Format)
Click here for help with the TRPC export
Click here for help with the TRIEPC export
The format for importing/exporting the entries from the website into TRPC/TRIEPC has changed significantly over the last year. If you are using an older version of TRPC/TRIEPC, refer to the following instructions:
Click here for help with the TRPC export (Revision dates PRIOR to March 2006)
Click here for help with the TRPC export (Revision dates PRIOR to 1 October 2005)
Click here for help with the TRIEPC export (Revision dates PRIOR to March 2006)
It looks like it's no longer there.
I'd suggest contacting JOT support and seeing if they can give you a hand - the file name sometimes differs, but the one Tabroom needs should be the text file for TRPC, I'm pretty sure.