Here is a xmas present for you. With vu+ 4K boxes the faciility for multiboot was only made available this year and what you have to do is let Openvix create the slots for you from the outset and then you can flash 3 images. Can I just say that from your first post you had flashed the wilobuild and that small window is the box outputting in 4k not PIP, if you had got closer to the box and pressed menu you would have seen the menu in the lcd screen and with care changed the resolution to 1080i.
To get your 3 slots do this.
"So flash your OpenViX image with latest image.
On boot, don,t restore settings backup if the system finds one !! Just select screen output (e.g. 1080 or 2160), language and setup internet, then exit out of install wizard. Should go to Menu screen, if so select MultiBootSelector or long press power button -----> select Enable Vu+ Multiboot.
The box will re- initialise and reboot.
On reboot, press Blue button and select ImageManager...........download latest ViX image and hit Blue button (flash) .....you will be presented with the normal slot available display. Choose one and flash.
On reboot, setup as normal." This is thanks to twol on WOS.
It will take a while and then reboot into vix and you set up as normal, now if you go to image manager and select an image etc and go to flash you will have 3 slots. Or press and hold power button.
To get wilobuild I first flashed openpli to slot 3, I tried with an empty slot but got an error. With openpli overwritten I got the option to restore and said yes and wilobuild was there as targhz. It was tricky and as the box is so fast I was not able to make a note but it works. NB when box rebooted after installing Wilo I am pretty sure openvix was flashed and then when clicking restore saw wilo option, so as always go slow.
Now my problem is how to configure those FBC tuners, i got 2 dual!! But only a quad lnb not unicable. ah its xmas and for a few hours I wont be disturbed.