I need to know the safest way to install 16.04 from 14.04, retaining all the files, apps and config folders. I have downloaded the file named "ubuntu-16.04.1-desktop-amd64" and I'd like to install it by booting from a USB, however in the manual page, it states:
There are bugs that affect the Ubuntu Startup Creator, when you run it in Ubuntu versions 12.04 LTS, 14.04 LTS, 15.10 in BIOS mode and try to create USB boot drives with other versions
Since I only have 14.04, what do I do now? Is it okay if I use the Startup Creator? Is there a 100% chance that I would retain all the files and install it properly if I do so?