I found the easiest way to extend the stand and whilst stretched, put pennies or washers between the open spring and the spring comes off easy whilst under tension & replace again whilst the pennies/washers are in place.
Undo the stand bolt , then slip the stand off the bike gently taking the tension off the springs. To refit put he springs on the stand and fittings then manoeuvre the stand upwards to allow refitting the fixing bolt.