Cannot update FM 2019 from Help menu -- AUPHD link/app? What is it?

When I try to update FrameMaker 2019 from the Help menu, I'm directed to Microsoft store to look for "auphd" link or app? When I go to MS store, no such link or app can be found. Cannot update FM. I'm stuck. Can anyone help please? Thanks. (I'm a monthly subscriber to TSC and never had this error before.)