I backed up libreelec setings in pendrive(programs / libreelec configurations), after start the new version I have restored the backup file and my configuartion and add-ons works fine.
Yes I Use the buildin backup menu from librelec.
It is very simple and easy. A god way to save configuration an add-ons
You need a usb pendrive, plug it ,vim must recognize the drive.
Look in programs, Libreelec configuration, just here is the backup menu.
There are two options backup or restore,
Backup, you must indicates it where you want the backup, look for your pendrive root and backup. It generates a .Tar file.
When you need to restore, is similar it ask for the .tar file and restore it. finaly Vim reboots and …Voila.
Why erase the internal firmware and the bootloader ? Just add a couple of variables in u-boot (activate-boot) and you can run any OS with any external media without disturbing the work of the internal firmware.
Yes, as what you said, basically, there is no need to upgrade bootloader, just setup ENV or CMDLINE to load different OS. But util our U-boot is stable and can fully support:
Android OS
Ubuntu
LibreELEC
DualOS: Android OS + LibreELEC
DualOS: Android OS + Ubuntu
There is no need to upgrade u-boot again, as in current stage, our team was still work and test on it, so, before that, we just recommend our users to erase the bootloader on eMMC when upgrade new ROM.