diff --git a/rc b/rc
index 2018352..6fd2ff4 100755
--- a/rc
+++ b/rc
@@ -30,17 +30,23 @@ function _q-tools-update-binary {
     # update self
     [[ -z "$QTOOLSPATH" ]] && return
     [[ -w "$QTOOLSPATH" ]] || return
-    #local foo
-    #echo "Updating with binary deletes the existing folder! sure? y/N"
-    #read foo
-    #[[ "$foo" = y ]] || return
     pushd ~ >/dev/null
-    set -u
-    rm -rf "$QTOOLSPATH"
-    mkdir -p "$QTOOLSPATH"
-    curl -L https://six9.net/software/q-tools/current.tar.gz | \
-      tar xz -C "$QTOOLSPATH"
-    set +u
+    if [[ ! -e .version ]]; then
+        touch .version
+    fi
+    local current_version
+    local remote_version
+    current_version=$( cat .version )
+    remote_version=$( curl -f -s -L https://six9.net/software/q-tools/current.txt )
+    if [[ "$remote_version" != "$current_version" ]]; then
+        set -u
+        echo "Update $current_version => $remote_version"
+        #rm -rf "$QTOOLSPATH"
+        mkdir -p "$QTOOLSPATH"
+        curl -L -f -s https://six9.net/software/q-tools/current.tar.gz | \
+          tar xz -C "$QTOOLSPATH"
+        set +u
+    fi
     popd > /dev/null
     _q-tools-reload
     
@@ -52,8 +58,6 @@ function _self_update() {
     if [[ -d .git ]]; then
       git remote get-url origin 2>&1 | grep -q https.*git.six9.net && {
         _q-tools-update-binary
-        popd > /dev/null
-   
       }
       if [[ "$1" = "-u" ]]; then
           git pull