What is LuaIDE.dll?

[Intrepid5295]

I'm into the "Grey Wasteland" and fighting some rotting thingmes, and Vista dumps me out and when I search to find out why, I find the message saying "LuaIDE.dll" cannot be found. So I search using Google, IE8,etc and get all kinds of gobblegook from "not yet assessed" to something that says I can d/l one of about 8-9 ersion of LuaIde.dll for a mere fee of $25.00 US (I assume). if I choose the $25 crapshoot, I'm not sure which version to choose! What the blazes do I do now???????