Don’t understand I’ve made hundreds preset for REVerence with no problem at all ! just make sure you don’t move/change your wave impulse folder. and use save preset as.
I have the same problem with all my Nuendo and Cubase installations. Sometimes paths, which I never change, are remembered but very often they’re not. Although I haven’t checked all situations under Cubase 8 now, because after lots of enthusiasm with REVerence, I lost most of the interest because of this problem. Sometimes it works to re-save one or two times a preset. Why? - don’t know. I cannot see a real pattern when the IRs are remembered and when not. It happens differently even in the same folder. I have my IRs collected in one folder with sub folders for all convolution plug ins.