diff --git a/vm/truenas-vm.sh b/vm/truenas-vm.sh
index 295dc6954..8d2447ade 100644
--- a/vm/truenas-vm.sh
+++ b/vm/truenas-vm.sh
@@ -293,16 +293,26 @@ function advanced_settings() {
   done
 
   ISOARRAY=()
+  local last_stable_index=0
+  local current_item=0
+
   while read -r ISOPATH; do
     FILENAME=$(basename "$ISOPATH")
     ISOARRAY+=("$ISOPATH" "$FILENAME" "OFF")
+    if [[ ! "$FILENAME" =~ (RC|BETA) ]]; then
+      last_stable_index=$(((current_item * 3) + 2))
+    fi
+    ((current_item++))
   done < <(truenas_iso_lookup | sort -V)
+
+  ISOARRAY[$last_stable_index]="ON"
+
   if [ ${#ISOARRAY[@]} -eq 0 ]; then
     echo "No ISOs found."
     exit 1
   fi
 
-  if SELECTED_ISO=$(whiptail --backtitle "Proxmox VE Helper Scripts" --title "SELECT ISO TO INSTALL" --notags --radiolist "\nSelect version (BETA/RC + Latest stables):" 20 58 12 "${ISOARRAY[@]}" --cancel-button Exit-Script 3>&1 1>&2 2>&3); then
+  if SELECTED_ISO=$(whiptail --backtitle "Proxmox VE Helper Scripts" --title "SELECT ISO TO INSTALL" --notags --radiolist "\nSelect version (BETA/RC/Latest stable):" 20 58 12 "${ISOARRAY[@]}" --cancel-button Exit-Script 3>&1 1>&2 2>&3); then
     echo -e "${ISO}${BOLD}${DGN}ISO Chosen: ${BGN}$(basename "$SELECTED_ISO")${CL}"
   else
     exit-script