Complained that Java Runtime couldn't be downloaded.
Finished install.
New Microsoft Edge browser don't allow plugins, Java couldn't be downloaded.
Installed Firefox and set that as the default browser.
Went to Java.com and downloaded the "offline" installer for the latest Java.
Installed Java.
Workbench seems to be running but I don't have a Variax here to test that with.
The software seems to be running properly and looking for a connected interface.
leesteel's post in Workbench on Windows 10? was marked as the answer