Question

I don't see the loop file in the browser, can you help me ?

Answer 1

Maybe this is what you are looking for.  Make sure you are following the process to fully install all Soundsets from your PreSonus User Account.  A link to how to do that for Version 2 and Version 3 Studio One can be found below:

http://support.presonus.com/entries/21704284--5-Installing-Additional-Content-PreSonus-Sound-Sets-

http://support.presonus.com/entries/68150974--5-Studio-One-3-Installing-Additional-Content-PreSonus-Sound-Sets-