There has been no change in 11.x to the way that 5 day journals are handled when BASE24-eps transactions are monitored on box (by reading the journal files).
In Prognosis 11.3, however, a generic BASE24-eps RTF (Real-Time Feed) reader was introduced that can receive transactions from BASE24-eps running on any platform and feed them into Prognosis. This reader runs on Windows or Linux, and can take transactions from BASE24-eps 2.0+ running on any platform. It is used as the default transaction monitoring method for BASE24-eps on Linux and zOS.
This method can also be used for BASE24-eps on NonStop, but does require BASE24-eps v2.0 or above, and the configuration is a little different with the Prognosis collectors being configured and run on a Windows or Linux server. If you need any more information on ths option, let us know.