After applying the keyin "buildingdesigner enable gc; task reload' in AECOsim Building Designer, the GenerativeComponents task menu gets activated but remains empty. The tools are not available there.
For SELECTSeries6 Update 1 version 08.11.09.866, you will need to download and install "GenerativeComponents Extension V8i (English) 32-bit version 08.11.09.436", dated 06 March 2016. This will offer some AECOsim Building Designer specific tools. However, these have been significantly improved in the CONNECT Edition.