At the top of the Kirrkirr window is a search box where you can type in a word or part of one. As you type letters, the Word List on the left will try to scroll to show you words that begin with (exactly) those letters. When you press Enter or click Find!, the program will highlight all the words in the list that match (that begin with what you have typed). If only one word matches, it will be selected and appear in the right hand side panes. Otherwise you should click on the word of interest from among the matches.
You can also click Filter Word List to change the Word List to just the words that match your typing. Clicking Clear will clear the contents of the search box.
If no words exactly match, the program will try to use some rules for spelling mistakes to find matches. All words that match this Fuzzy Spelling will be highlighted, and if there is only one matching word, it will be selected. If still no words match, Kirrkirr will say Nothing Found in the bottom status window.
The search box searches in the language that is selected in the left hand side Word List. If it is displaying English, the search box searches English words. If it is displaying Warlpiri, then the search box searches Warlpiri words. If you want to search in the other language, then you should click the button above (In English/In Warlpiri) to change the Word List to the other language. Similarly, you can click the Reset Word List button to make the Word List show all words in a language. This is useful if you have previously filtered the Word List.