When you buy a Soundpool, it should download and install right away. Did this not happen? Do any of the Soundpools show up in the Media Pool under loops?
Try this: under the Store tab, click on the parameters gear (top right) and select "Download all purchased content." Do the new Soundpools show up on the list? If so, then download them.
Failing that, go into the Program parameters, General options tab, and click on Clean up Store. There is also "Rescan Soundpools." After doing this, log back into the Store and try the above method to get the list of purchased content to download.
yes, i downloaded and installed right after i had bought the several soundpools, about 15. but some of them dont remain in my list of soundpools. i repeat the procedures and they dont work. i will to do the parameters suggested by you. thanks.