PB version 11.5 was EOL on 12/31/2011.
From the Sybase web site, versions 11.x, 11.5. 12.x, and 12.5x (except version 12.5.2) will no longer be available, including EBFs, as of April 2013.
http://www.sybase.com/detail?id=1099337&contentOnly=true
So, I would have to conclude that if you wanted a supported version for Windows 7, then you would need to use version 12.5.2 or later.
Hope this is the "right answer"!
Randy