I've upgraded OK but I'm missing official addons!

OFP upgrades have come in two flavors so far: Ultimate Upgrade patch files, that include a version's addons and standard upgrade patch files, that only contain program code updates.

Not sure if that's your problem? A simple way to check might be to compare your patch file's size with those listed on the BIS download page. For example, the Ultimate Upgrade 3 patch file is 32MB, whereas the standard version 1.30 upgrade patch file is 20MB.

As you see on the BIS download page, if you didn't install an Ultimate Upgrade patch, you can download the addons, as they are available in separate files just for these occasions.

The moral of the story is from now on, only install Ultimate Upgrade patches.