TomTom POI`s exporting/saving/importing

Question: is it possible to export TT POIs that Ive created to a file on my PC to be saved for later use.
My work involves working for several diferent high street retailers, so as I visit unusual store locations I create a POI for that location, BUT several weeks later, I may be working for another retailer, obviously due to the limitations on the number of POIs TT will save. I would like to be able to export to my desktop file the current POIs for retailer A, and swop/import the POIs for retailer B etc etc rather that erasing the saved POIs that I`ve built up on my IPAQ.
How can I do this ?

I tried that with the Garmin i3 but cant do it so i just write down the name and street +postcode in a little book.not ideal but better than losing the info sooner or later