I don't know where I read that 64-bit thing. VST3 allows 64-bit processing however not 64-bit only as I incorrectly stated. All my plug-ins are 64-bit where possible, although I had to reinstall an older version of Sonar X1 to make use of Superior Drummer 1.6 which I prefer to the new interface at the moment. The sounds don't playback in 64-bit for some reason.
Anyway I never actually tried to separate the Adaptive Limiter as I only use Sonar.