I installed Cubase 9 with high expectations. When I went to use some of my mastering plugins from waves, I foudn they a re mostly blacklisted. When I try to take them off the blacklist, i get a message they cannot be taken off. I have over $5000 of waves plugins I cannot use now. I have twice as many on the blacklist than off. They all worked fine in Cubase 8.5.
I didn’t have this problem with 9.0.10, but then had it after updating to 9.0.20.
I went through an hour-long orgy of clicking to get it fixed, so I can’t exactly say for sure what worked, but I think it was moving the 64-bit plugins from the (X86) folder where Waves had put them, into the the same folder that all my other 64-bit plugins were, then rescanning. After that, the plugs were no longer blacklisted.