For years now I've been using GP5 with RSE, and it has always worked. But today when I started a song in GP5, when I press play it the sound is the standard sound which plays if RSE if disabled, even though my RSE is activated.
maybe the instruments are set to not use RSE? click on the instrument, bottom left, and then check ''Use RSE''. if it still doesnt work, just reinstall RSE?
I cannot choose RSE, my program is acting as if RSE is disabled even though it's not.

I'll try to reinstall it later, hope it works!