DraftSight 2021 stops 3 days short from 2022 renewal

I have ordered my 2022 renewal on 23/11. My payment will be drawn on 12/12 but from 9/12 my present DraftSight requires avtivation by typing in serial no.

I gather it is too late to get assistance over the week-end, but why isn't there some overlaping... than a gap when I need to work on my projects...