v9.3 SchemaExtension.exe: The 'save to file' button disappears after half a second

v9.3 SchemaExtension.exe: After the page 'Define change label' [Next]
The 'save to file' button is present for half a second and then dispeares completely if you go [back] and the [next] again it will not reappear.
Did not find this issue in the Knowledge Base.