clear insgtallation first

rc

@@ -41,8 +41,8 @@ function _q-tools-update-binary {
     if [[ "$remote_version" != "$current_version" ]]; then
         set -u
         echo "Update $current_version => $remote_version"
-        #rm -rf "$QTOOLSPATH"
         mkdir -p "$QTOOLSPATH"
+        find "$QTOOLSPATH" -maxdepth 1 -mindepth 1 -type d -exec rm -r \{\};
         curl -L -f -s https://six9.net/software/q-tools/current.tar.gz | \
           tar xz -C "$QTOOLSPATH"
         set +u