diff --git a/processor/helpers.go b/processor/helpers.go
index ad528dc..42484b3 100644
--- a/processor/helpers.go
+++ b/processor/helpers.go
@@ -4,9 +4,10 @@ package processor
 
 import (
 	"fmt"
-	str "github.com/boyter/cs/str"
 	"os"
 	"time"
+
+	str "github.com/boyter/cs/str"
 )
 
 // Returns the current time as a millisecond timestamp
@@ -32,13 +33,6 @@ func makeFuzzyDistanceOne(term string) []string {
 		return vals
 	}
 
-	// This tends to produce bad results
-	// Split apart so turn "test" into "t" "est" then "te" "st"
-	//for i := 0; i < len(term); i++ {
-	//	vals = append(vals, term[:i])
-	//	vals = append(vals, term[i:])
-	//}
-
 	// Delete letters so turn "test" into "est" "tst" "tet"
 	for i := 0; i < len(term); i++ {
 		vals = append(vals, term[:i]+term[i+1:])
@@ -51,6 +45,13 @@ func makeFuzzyDistanceOne(term string) []string {
 		}
 	}
 
+	// Replace a letter or digit which effectively does transpose for us
+	for i := 0; i < len(term); i++ {
+		for _, b := range letterDigitFuzzyBytes {
+			vals = append(vals, term[:i]+string(b)+term[i+1:])
+		}
+	}
+
 	// Insert a letter or digit
 	for i := 0; i < len(term); i++ {
 		for _, b := range letterDigitFuzzyBytes {
diff --git a/processor/tui.go b/processor/tui.go
index d15277a..0c69704 100644
--- a/processor/tui.go
+++ b/processor/tui.go
@@ -4,14 +4,15 @@ package processor
 
 import (
 	"fmt"
-	"github.com/boyter/cs/file"
-	str "github.com/boyter/cs/str"
 	"runtime"
 	"strconv"
 	"strings"
 	"sync"
 	"time"
 
+	"github.com/boyter/cs/file"
+	str "github.com/boyter/cs/str"
+
 	"github.com/gdamore/tcell"
 	"github.com/rivo/tview"
 )
@@ -51,6 +52,10 @@ func tuiSearch(app *tview.Application, textView *tview.TextView, searchTerm sear
 		tuiFileWalker.Terminate()
 	}
 
+	if tuiFileWalker != nil {
+		tuiFileWalker.Terminate()
+	}
+
 	// TODO still a race condition here to need to resolve as we call terminate multiple times
 	// We lock here because we don't want another instance to run until
 	// this one has terminated which should happen with the terminate call