I click Get to download it
It then says try again later ... "Something happened on our end".
Not sure if my company is blocking it in my office, but colleagues in the US can download it fine.
I sent them feedback
There is another way to get Explorer for ArcGIS Windows, if you do not have store access.
https://community.esri.com/groups/explorer-beta/blog/2019/07/01/sideloading-explorer-for-arcgis
Mark
