Hello. Quote here some articles and i asked if there is no way to create and restore a backup after a software update?

"The Nokia N900 has been finally updated to 1.2009.44.1. Apparently v44.1 is just a minor update and I haven’t noticed any changes by now. The update can be downloaded either via the Nokia Software Updater or straight from the application manager.. Unfortunately, the N900 doesn’t support UDP (User Data Preservation) so that all your applications, e-mail accounts, custom background and your homescreen will be wiped out when you update it with the NSU". maemoworld.org

Do i understand? because only from the NSU can not restore the data?