March 18, 2013, 01:59:45 pm
Hi Mikey, please go to the
Account Settings and add your Lumion license. As soon as you have done this, you will get access to the
Commercial Users forum where we provide faster support.
Anyway, brace yourself for some bad news: your Nvidia GT640 is not fast enough to run Lumion correctly

Have a look at the
PassMark section in
this FAQ post.
Your card unfortunately only has
1296 PassMark points, so your only option is to upgrade your graphics card - and possibly other components in your PC. If you would like us to assist you with this, please let us know what your budget is and what all the specifications of your current PC are (including current power supply etc).