I used Wugfresh' root installer before and it worked like a charm. You can't get any OTA's with it though. Since I wanted Android 7, I wanted to unroot, install the OTA and reroot using Wugfresh' client. I already did this before when I wanted to upgrade to Android 6. Then everything went well and I was done in an hour.
This time however, I'm stuck. When it needed to reboot after succesfully installing Android 7.1.1, I got set to the No Command screen. After some googling I found out that you had to go to the bootloader first, and then go to Recovery. I got that far, but now I have no clue on what to do.
Rebooting from there doesn't work (obviously). It seems logical to me that I have to install TWRP, but the zip file is not there anymore to install it. Is there a way to still get this zip file on my phone while in recovery mode, and is this the solution to my problem? I also found the format option in TWRP. Does that get rid of all the TWRP stuff and bring me back to complete stock, so I can go back to rooting everything again? I'd be happy to do so, since right now I'm sitting with nothing but a dead Android.
Thank you so much for your help in advance!