On Mac 10.6.5 the application has a generic icon. Having found a previous 9.0.0 trial, I determined that what is new is that the icons in the application bundle are of a higher resolution, presumably because of Apple recommendations and new APIs related to the introduction of high resolution laptop screens. By copying the Resources folder from the 9.0.0 trial to the 9.0.1 one, the problem is solved: the icons are displayed as usual. But this is not something that one is expected to do.
On Windows, no luck. My Windows XP virtual machine goes into a blue screen and restarts as soon as I launch the 9.0.1 installed trial. But I have just seen that the minimum requirement for Windows XP is SP3. So this might be the cause. But even then one would not expect the system to shut down when the program is launched. I heard about the bug on Windows when version 9 was out and I heard it was quickly resolved, but this is possibly something different even if the symptoms are the same.