I don't have this remote myself (nor would I want one, to be honest) otherwise I would simply have quoted how to do it from the manual.

Therefore, the best I can do is show you where you can buy a manual (with a free remote) and give you an alternative manual to try.

The manual that I posted the link for is made by the same company, it looks somewhat similar and it has a SETUP button. However, I assume that you've already tried the search method as described on page 8 of that manual and I further assume that it didn't work, in which case I'm all out of guesses.