How to see a list of items which have [X] set as enable marker? I got a big list of NPCs in my disable list and now I realized a number of them have an enable marker (which caused serious bugs when disabling).

FO3Edit is great for that sort of thing. Just open your plugin(s), find and select your parent marker, then click the "Referenced by" tab in the right panel and all records referencing it will be displayed. Alternatively, you can R-Click the marker in the GECK and "use info" to do pretty much the same thing.

Exactly what I was looking for. Thank you.