After opening v2.3b5 I draw a straight wall, then do a right-click to edit its features. No window opens. I then try Plan --> Modify walls and no window opens.
I close v2.3b5.
I open it again and load one of the Brad Pitt houses. The program crashes while loading. I repeat the procedure and get another crash.
I then try the Sosnowksi house (see gallery for all these houses) and again the program crashes.
I shall now restart my PC and see if things are better.
To be followed...