Today was a bug fix day. You will find a lot of small annoyances fixed.
First of all all constraints like rectangle width one are right now working just on rectangle. Also all strings to property grid seem to be fixed regarding constraints.
Also it was possible to crash Naro if you launched the Zoom Window tool as some incompatible types were used internally.
When you change the name of shape, the tree view updates accordingly
Deleting a line will not make Naro crash.
Just if you wanna see how the release 1.4.5 will be, you can try the nightly build (the link is on the right side). Hopefully you will find a good constraint support and fewer crashes.