When you update Replay AV to version 8.8, you are advised to uninstall your existing version of RAV before installing the new version.

I did this, but then discovered that my version of MP3 Magic was disabled. Altough MP3 Magic is no longer supported, I find it very useful.

So I restored my system back to RAV 8.75, and then updated to 8.8 WITHOUT uninstalling the older version, and all seems to be well.