Release note of the version are [[rn-031116|here]] In the event generation menu an option to prepare old-format event files (a-la 4.2 and before) has been added. **How to install on 64bit lxplus.cern.ch machines**, where 32bit libisajet and libmath from cernlib are found by ./configure in the directory /cern/pro/lib: (0) make clean (1) change in CFLAGS: -Wall -DNUM_LONG -DCOMPHEP -m32 (instead of -Wall -DNUM_LONG -DCOMPHEP ) (2) change in CLIBS: -L/usr/X11R6/lib ( instead of -L/usr/X11R6/lib64 ) then compile by 'make'