Bernd,
> => does not work anymore!
> has something changed?
as far as I can see, you are still using the "old" (pre-2016) signing
method.
Please check:
http://www.lindersoft.com/forums/showthread.php?47199
Comodo timestamping works fine for both SHA-1 and SHA-2 (see attached
screenshots). Please use the "new" Comodo timestamp server.
Does this help?
Friedrich