I'm planning to upgrade from Maverick to Natty, and to try out Unity, but I don't want to lose any settings, customizations and downloads in Maverick. I just want to know, if upgrading alter anything that I said earlier? I don't want to start over with a clean, fresh Natty, and I hope I can keep all of my files and folders and settings in Maverick, and to have them in Natty after the upgrade. Is this possible? Should I use Update Manager to achieve this? And would all my compiz-settings be reset after I upgrade? Sorry for too much questions, but I'm asking this because you know, in Windows, any version upgrade would require the disk to be reformatted. I hope Ubuntu is more convenient than that.