Clicking this link exports your purchase invoices, purchase credits, and supplier records in a 
format that can be read by your accounts package.
Every time you enter an invoiced item in purchase 
invoice entry a purchase transaction record is 
saved.  When you want to export them, it will write the files (one for the invoiced items and one 
for the suppliers referenced by those items) and then mark the record as "exported" so that it 
doesn't export the same transaction twice. 
You first see a screen similar to the following:
The first time you see this screen the file names will be blank. Use the "..." buttons for each file to 
guide you to the folder from which you want your accounts program to pick the data up,  then 
enter the file names.
Then simply click on Start, and the files will be exported.
N.B. It is your own responsibility to delete the old files after you have successfully imported them 
into your accounts program.