He,
I just installed the new release.
Not any crash at opening but program freezes (« not responding ») during 10 à to 20 seconds at each action / profile param value update, insert or delete or move any item on the build plate, record profile, etc. Loading a project is so so slow.
I do not have any of these problems with my current 4.3.0 version fortunately still active.
Spectre, Win 10 family 64 bits, Intel I7 6500 CPU, 8Go
Active printer : MK2
sorry