The update time will depend on the Manufacturers you have installed and your internet connection. We have done everything to help minimize downtime; however, users with a lot of manufacturers installed or with slower internet connections may want to run the update at the end of the day or during the weekend to minimize downtime.
During testing, many machines were able to reinstall all catalogs within 1-hour. The update should take 3-5 minutes per catalog. Reminder each manufacturer can have many different catalogs.
For testing, a clean computer with 30 manufacturers in the old data format was downloaded and installed in about 9 hours. The update to the new data format took 45 minutes.