I have just started using after effects, and want to use BCC to stabilise video.
I loaded the BCC plugins, and although all the BCC plugins show under the effects tab, they are
all greyed out so I cannot use them. Do I have to reach a certain stage in the workflow process
for these to become active, or could it be something else?
I don't know what you mean when you say "effects tab". Could you post a screenshot?
Are you seeing this same greyed-out appearance for other effects? Do you have a layer selected?
Also, why are you using an expensive third-party plug-in suite for motion stabilization if you just started using After Effects? Did you already try the built-in tracker and mocha-AE and determine that they couldn't do the job?
If you're just starting out with After Effects, I strongly recommend that you begin here: