Since all the major modules for the Foudnry World have been finally updated (or are compatible with v12) i've uploaded a v12 version of the foundry world. The rar file also contains instructions for installation and an explanation fo the main modules used.
Remember to make a backup of your world and modules, and then that v12 requires a clean installation. Once done, update the modules or download the other missing THEN follow the instructions of the new PDF file