Little help with setting up an Experience in Firestorm needed

[Sukubia Scarmon]

Hello! 
I just want to make an experience-teleporter, and I got a script for that - however, in the included guide on how to enable said expierence it's said I need to recompile the script specifically for it.

"LSL scripts must be specifically compiled for an experience in order to make use of experience-related LSL functions. The bottom of the LSL editor in the Second Life Viewer includes a checkbox for Use Experience and a dropdown for selecting which of your experience keys you wish the script to use."

I'm using firestorm, latest version, though, and either I'm extremely blind, or I can't find such a checkbox anywhere or my english is becoming worse by the minute and I missunderstood something. So I don't know how to do this step. 
Google wasn't really helpfull in that regard either.

[KT Kingsley]

In the script editor, right at the bottom left, is a Use Experience checkbox. When you tick that a drop-down appears with the experiences available to you for the compilation.

[Sukubia Scarmon]

Okay, what is the script editor, maybe that is where I am going vastly wrong.
I jsut click on the script, this window opens:

(Einfügen = insert, gives me a list of commancs I think; Bearbeiten = modify, dunno, it want's to open the app store.)

[KT Kingsley]

Off the top of my head, it looks like you've opened that script from your inventory. I'm not sure, but I suspect that like the Reset, Running and Mono options, the Use Experience setting is only available inworld. You'll have to put the script in a prim and edit it from there. You can take it back to inventory afterwards, and I think it'll keep the experience association.

[Sukubia Scarmon]

Yeah, I opened it in the inventory -  so I put it into a prim, and lo and behold, I had those options. 
Thank you so much, now I got it working!