Due to changes that exist but will also be made to your device, you need to install the software from scratch using a USB flash drive (not via an internal installer).
For those who don't remember, download the software (full version, not multi-download), unpack it, and transfer the contents to a fat32-formatted USB memory card. (you should have 4 .bin files inside).
Turn off the power to the receiver and plug the USB flash drive into the USB 3.0 port, press the standby button on the receiver and turn on the power switch (hold until "update"appears).
On the display that appears, select "flash Programming", once the process is complete, you can restore the channel settings, re-add extensions, and so on.
Now you have 3 more slots to install the image of your choice ...
The multi-loading mode is the same for most receivers on the market (for example, edision, zgemma, etc.) But it is new / changed for the sf8008. In practice, this means that the software of other teams is not currently compatible, but this will happen soon when other teams update to a new type of multiload.