I installed version 9 in eval mode into a new folder. Now version 8 fails to start.
How do I find my version 8 registration code?
You can't install both 8 and 9 on the same machine. They conflict with each other.
If you reinstall Opus 8 it'll probably work fine without having to give it your licence details again. If not then there's a page at www.gpsoft.com.au that lets you retrieve your licence details code via email.
OK. Thanks!