Hi @WillowMeDown! @roosterburton has great videos for the Rooster extensions linked on the main extension page: Web Browser Extensions (Software) for LingQ
These are ones I found particularly helpful for the Editor:
The directions for getting it to pop up are quoted below for your convenience:
More videos and visuals for the free version of the editor:
For the new .txt file feature, that is only in the Premium Version, the Patch 1.18 Video shows how to use that feature:
Edit: Note: Patch Video 1.15 shows how to use the Premium Editor Version without the .txt edit feature, but it still works the same way with the most recent patch.