Another hint:
1) I made a clean install of LW 4.12 (just an older one....)
2) it installs and starts OK
3) I can get to final LW working screen, there I get colour mismatch vista message and pop-up that prog is not installed correctly (usual vista warning)

So I really don't understand what's happening.
My LW (latest one) WAS working.
It stopped suddenly. Can it be related to latest vista patches???