Invalid Data File and Invalid File Format

@Patch I can not remember the version on the old Hard Disk. The Hard Drive crashed. The only info I have is that the Data File was backed up on 09.08.2021. I can only assume that it should have been a version during that date.

The version installed now is 21.11.95. I did check Github, but it only give the version numbers and not the dates and therefore I am unable to match a version on Github with the date 09.08.2021.