Alright here is how to "update" LGUP's DLL
1. Download the KDZ on the original post, it contains the DLL we will need.
2. Download
https://forum.xda-developers.com/showthread.php?t=2600575 this tool to extract the DLL from the KDZ
3. Give it the KDZ location > Check the box next to LGUPc.dll (this is the LGUP_Common.dll in your LGUP folder you already have, it's just a shortened name in the KDZ file) > Then click Extract KDZ (This will drop the LGUPc.dll into the LG Firmware Extract's folder)
4. Rename the DLL you just extracted to LGUP_common.dll
5. Find where your LGUP folder is (For me, its located in C:\Program Files (x86)\LG Electronics\LGUP)
6. Once you are in the main LGUP folder then goto model then common
7. Congrats, you have located the pain in the butt DLL that prevents you from flashing Nougat!
8. Now, delete the LGUP_common.dll in that folder (or back it up) and replace it with the one you extracted and renamed from the KDZ earlier!
9. If you did everything right, you should be able to flash Nougat with LGUP now.
(PLEASE KEEP IN MIND YOU STILL CAN NOT ROLL BACK TO MM 6.0 AS OF 7/24/17

)
10. Slam that shinny Nougat 7.0 KDZ file into LGUP and see if you can flash!