I just tried replicating these issues. Comments below..
I can't recreate this issue? All seem to work perfectly fine for me here. Can you describe step by step how you make it crash? Here is a screencast of how it works for me..
This also works fine for me here, as shown in the screencast below. Would you mind taking a look at this thread and see if it helps. Note that you may need to save a copy of the preset example to a user directory as the latest versions of Windows can restrict writing access to system drives where the examples are stored.
It sets the width of the keys..
That's a typo. It should be mouseoverkeycolour()... I'll try to sort those typos when I get a chance