All seems fine until I file the flight plan then P2A freezes any ideas please

 

if it's a long flight and you have "Calculate Safe Enroute Altitudes" check in the options, it can take a long time to do the checking.  Unless you're flying at very low altitudes, you should uncheck that option.

Also, if you're using the Public Beta versions, try the Public Beta 2f.  It does fix a filing issue that was in Beta 2e.

Dave