Hi, I am wondering if there is a proper documentation for the migration from 0.17.3 to 0.18 or above. I would really appreciate if somebody can point me to some documentation or share your experiences here.
You should be able to do this in one pass. Back up your database for safety first.
After installing the new (1.0.8) software, run http://<myserver>/admin/upgrade.php. This will bring the database to the 1.0.0 level. Then run http://<myserver>/admin/install.php to finish the upgrade.