I just updated to the latest version after being prompted.
Now FMS Data Manager will not open.
A similar thing happened 4 or 5 months ago.
With the help of Richard Stefan, the problem was fixed & a new version was released.
3 x Windows 10 Home 20H2 19042.906 64 bit not working.
2 x Windows 10 Pro 20H2 19042.906 64 bit working fine.