Thank you for the advise. I had already tried it with web start and that works fine. My issue is with the standalone version intermittently Not Responding on startup.
I'm not convinced it's a graphics issue. I was going to fallback to successively older graphics drivers today and see if that resolves the issue. However, I just started the standalone SH3D and it's working again. So, next time it stops working I'll play with the drivers.
Hmmm it appears I'm already using 32 bit - I assume that's what was bundled with the download. Java version 1.8.0_71 / 32 bit / 0.6 GB max
Maybe I should try 64 bit?
Anything else you'd suggest looking at which you've experienced hanging this?