To apply a LUT to your clip, right-click your node, go to LUT and select the camera that you used (if it’s available).

To delete the LUT from a node, you can:

Click one the Reset Node Grade.

OR

Choose the No LUT selected option on the drop down menu.

You can also navigate to the top left corner and click on LUTs.

This will open up a LUT library that also shows you a preview of the colours. If you hover over any of them, you will see the preview on your playback.

To use the LUT you can:

Double-click on the LUT.

OR

Drag and drop the LUT onto one of your Nodes.

Navigate to File > Project Settings.

Go to Color Management and click on the Open LUT Folder.

Upload your new LUT to that folder, click on the Update List in Color Management panel and Click Save.