Hello,
I recently installed OPUS through EW installation center and when I loaded CW, I noticed OPUS didn't come up as an option to be loaded. I also have ENGINE installed, and everything there is working fine + I installed PLAY from EW's installation center just to make sure that wasn't getting rogued as well, but that did indeed come up in CW. Uninstalled OPUS a couple of times and nothing came of it...
Don't know if this helps, but I recently switched from another computer (where I never had this problem) and moved my composer cloud license through iLok to this computer. Also, OPUS actually runs perfectly as standalone. Also tried reinstalling cakewalk.
If anyone has any suggestions about this, I would be very, very grateful for any help!
*I tested it on Reaper (60 day trial free version) and OPUS loads there