HyperCard conversion - no more?

[Till Bandi]

I wanted to convert an old Hypercard stack but found out, that the  
manual doesn't seem to be correct anymore:

"Open Stack... Opens the main stack whose file you select. If you  
select a
HyperCard file, it is automatically converted into a Revolution
main stack. "

This does not work. I went back to version 2.5.1 an there it worked.  
Was that announced?