Yes it worked for me as well. Thanks for the effort and the advise
After the update I got the following three errors:
1. +741,"Cal checksum failed, string data"
2. +745,"Cal checksum failed, DAC cal constants"
3. +746,"Cal checksum failed, Readback cal constants"
So I did a calibration with software adjustment. Also I checked before and after the performance.
Before was way off. An output of 25 V gave a reading of 21 V, 1 A programmed supplied only 600 mA etc.
After adjustment the worst point uses about 20 % of the read back spec and 13 % of programm accuracy spec.
So thanks again. Before I found this thread I was under the impression the firmware could not be upgraded.