In the appstore, go to the module. Below the download button is a tab 'All versions’, here you can download older versions like 1.2.0. You can also do this from within the modeler.
Thanks Sytze. Unfortunetly, there are not any downloadables under All versions. (https://appstore.home.mendix.com/link/app/104730/) . As a workaround , I exported the module from an existing project and imported it to the project.