Did you open the application package and install LUTs directly within Premiere Pro? If so, this is not advised and could be causing some of your problems. I recommend completely reinstalling Premiere Pro on both systems to restore the LUTs to the default state that our engineers intend. BTW, they are matched by number, not by name, because users are not supposed to change those folders in any way.
If you update to 12.1.0, we have added a new way to manage LUTs. Read below
If you are using several custom LUTs and want them to show up in the Lumetri dropdown menus we have a solution which is newly available in the most recent update (2018 - version 12.1). You can install your LUTs into a specific folder in your user library and Lumetri will scan them in. Here are steps to set that up.
Mac
- From the finder, use the Go menu to navigate to this directory: ~/Library/Application Support/Adobe/Common/
- Create a folder named LUTs
- Create two more folders inside the LUTs folder: Technical and Creative
- Copy technical conversion LUTs (often called camera LUTs) such as LOG to Rec709 into the Technical folder
- Copy creative LUTs such as day-for-night, B&W, or anything that is just a stylistic look into the Creative folder
- Restart PPro
- Technical LUTs show up in the Input LUT dropdown inside the Basic section in Lumetri
- Creative LUTs show up in the Look dropdown inside the Creative section in Lumetri
Windows equivalent directories:
~\AppData\Roaming\Adobe\Common\LUTs\Technical
~\AppData\Roaming\Adobe\Common\LUTs\Creative
This is a convenient and easy way to add as many LUTs as you like to the Lumetri dropdown menus and this will persist through updates - unless of course you delete or change this directory.