Can the DraftSight Standard Licence be used for an older DraftSight Version?

In the moment we use DraftSight Version V1R3.2 as freeware. So next year we want to buy Standard Licences. Is it possible to use DraftSight Version V1R3.2 in 2020 with the bought Standard Licence? Or do we have to install a newer Version of DraftSight?