AspUpload.com - Download Best to get the information from their website as I don't believe Plesk can be held responsible for any third-party application not directly developed by Plesk.
is a server core or GUI version of WS 2019?
If server core then you need to download it on a remote pc then copy their file to the server e.g. use \\Enter IP Address\c$ and move the file here, Now on the server open PowerShell and navigate to the folder c:\ and then use the command .\filename.exe (or whatever the file name is for that application) then it will install, however, GUI is a simple click and run as you already know.
if it's VM install then make a snapshot\checkpoint first then install the app if it works cool and if not restore the snapshot\checkpoint no harm done.