I install new 'Profesional' version over earlier 3.1r1 and all was functioning fine for about 15 minutes. Then the screen become confused and most controls stopped responding. 'Session save' still worked so it was no total loss. On restoring session it worked again for some time, then the same happened. Re-booting computer did not solved the problem so finally I installed older version back and at least that is running OK.
Anybody has the same experience or am I alone in it?