Went for a ride today, when i downloaded the data from PP I got six ibr files - was expecting one... does this happen if you stop for a period of time or...? I had a chain slip, stopped for an ice cream, v hot just now and got stuck at a junction for ages, but that might explain three hmmm.
After you download all your files, you can merge them together.
Open the first part of the ride, then use the command "File/Merge File..." to append the next file. Repeat this process until all files are merged. Save the merged file.