I'll go out on a limb:
I see there is a 1.0.3 IDE available.
I also read that it needs
.Net Framework 4.0
I just tried with 1.0.1 - which used to work and it now doesn't.
But if I am to move up to / on to the new GUI/IDE, I will need that installed.
I have only just got access to the "interweb" and don't now if I have that installed.
I have XP SP3 and I am getting "updates available" but they are UPDATES, not installs.
How/where do I get this .Net Framework 4.0?
I shall ask Mr Google as well, but this may be a factor for not only me but others - which is why I am declaring it here.