Hi Dave,
When you click <Help> then <About>, the 'screen with the pretty blue cube appears'
If you click anywhere in that screen, it should disappear.
If it doesn't, then something is wrong - might I suggest a fresh download, and a re-install of that download - just in case.
I have just tested my01.05.06.0525 download, which also tells me that it is version 'eng (x86_64)' as well - and the About screen behaves normally.
Can you let us know if you are still having problems.
Cheers,