I have tried both doing an upgrade, and uninstalling then re-installing to the newer v1.4, but nothing I do seems to get the vBAdvanced module to work.
I have followed your destructions to the letter, re-read them, got a third-party to read them, but alas, still no module appears.
This morning I did a 'virginal' install of vBulletin on one of my office dev machines ('nix box) no mods/hacks at all, went through the install procedure precisely to the letter, the chat box works perfectly, but still no vBA module