This is what the instructions say:
"ALiVE must be in @ALiVE folder in ArmA3 (Warning: folder name is case sensitive!)"
I read that as a warning about the case sensitivity of the @ALiVE folder, rather than as explicitly saying to put @ALiVE in a particular ArmA 3 folder. There's no mention about the map folder location that I've seen.
Perhaps this might help to clarify for other potential contributors:
"Both the @ALiVE folder (warning: folder name is case sensitive!) and the custom map to be indexed must be placed inside the ArmA3 game folder (which contains Arma3.exe)."
Was there any thought about the broken link to the .dll or it's unavailability?