Here you can download the LGUP DLL for LG Aristo 2 LMX210MA from MetroPCS
The LMX210MA DLL installer (LGUP_X210MA.msi) will install necessary files which enable LGUP tool to detect the model number and software version of your phone.
After installing the LGUP_X210MA.msi and LGUP Tool, You will be able to use LGUP to upgrade/downgrade the software of your LG Aristo 2 LMX210MA.
Download LGUP DLL for LG V410
Need to download both files from above links.
How to install LGUP DLL for LG Aristo 2 LMX210MA
Just download the LGUP_X210MA.msi
Double click the LGUP_X210MA.msi to install LGUP DLL
Rename LGUP_common[X210MA-18.104.22.168].dll into lgup_common.dll
Copy the lgup_common.dll into the folder C:\Program Files (x86)\LG Electronics\LGUP\model\common, and overwrite the existing DLL.
Now You can download and install LGUP Developer 1.14 patched and use LGUP to upgrade/refurbish/unbrick/restore your LG Aristo 2 LMX210MA smartphone.