Please see these guides:
[ul][li]Registration Certificate suddenly expires or does not stick (if the problem is installing the certificate)[/li]
[li]Problems installing Opus (if the problem is installing the program itself)[/li][/ul]
Please see these guides:
[ul][li]Registration Certificate suddenly expires or does not stick (if the problem is installing the certificate)[/li]
[li]Problems installing Opus (if the problem is installing the program itself)[/li][/ul]