Yea your right, no java errors there... Took a quick look and thought those were from java engine.
I examined this error more deeply this morning on my Vista desktop. If I run MakeMyMap with normal privileges I keep getting the "Not valid number: xx.xxxxxxx" error twice on every number and the start button stays gray so I can't start it. If then again I run the program with admin privileges, I get System.Runtime.InteropServices.COMException error. Something about COM-classfactor retrieval error number 80080005. Typing numbers manually didn't work eighter, if I run it with normal rights it gives the same number errors and with elevated rights it crashes with the error.
Trying it on my XP laptop now to see how it works. Vista is a bit quirky with programs not designed to it...
Oh and my GE version was 4.2.0205.5730
Getting 4.3 now to see if it makes any difference.