In the above screenshot, you see we have selected All Places with State=AK. In the second part of the window we give that we want to search in the AK_DECI.txt file downloaded from GeoNames, using the parsing method: ''GeoNames USA state file, city search''.

Note that if you want to change AK into Alaska, this would be possblepossible. Just set state=Alaska in the set attributes section of the window.