Thanks, KenK, for sharing this fix!
I made a couple updates to the steps in your message, adding names of the windows and menus.
Adobe Community Help & Learning team
This is not working for me. I follow the instructions to the T and still I have the exact same problem - no offline help is available. When I open the Help Manager and it shows that the help files are current and I click one and then ask to open the PDF, I get nothing happening at all.
If I click in Help Manager to see offline help only, hitting F1 in AE does nothing. If I allow Help Manager to view both offline and online help and hit F1, no problem; as long as I'm online!
There was another fix listed to resolve this issue that did nothing too. For some time it was just wait until June, well the PDF files are available but Help Manager has become Frustration Inducer.
Where to now?
Hi Unity2K: can you confirm that the PDFs are located in the following directories?
Windows : C:\Users\Public\Documents\Adobe\ (Help and PDF directories within)
Mac : \Users\Shared\Documents\Adobe (Help and PDF directories within)
Also, do you have any other CS6 products installed besides After Effects? If so, is this same issue affecting your other Adobe products?
One more idea: in KenKandAdobe's original post, he recommends skipping Step 1. I would actually recommend NOT to skip step 1 since this is how new configuration files are specified for installation. There is a unique configuration file per point product so ensuring that a correct config is in place for each product is essestial. So for Unity2K, I would specify After Effects in Step 1 and then proceed with the rest of the steps as outlined here: http://helpx.adobe.com/creative-suite/kb/help-application-doesnt-update.html