The version number 1.2.50.43 is currently displayed in VulnDetect.
In the title bar of the GOG Galaxy window the version 1.2.50 is shown.
But in the settings dialog at the bottom there is the version number 1.2.50.43 displayed.
So the issue is solved!
Perfect
Now I see the product FreeCommander XE and the following version numbers:
2018 release 770 public
2018 release 784 donor
2018 release 783 donor
This is the best way how to display the versions.
Thank you, @Tom !
Issue solved!