I haven't found an answer to my 'delete' question yet but have posted a new thread on ED and will deal with that issue later.
Couldn't resist any longer so have commenced the download anyway.
Just did some tests on the 'old' version and getting avg. 30fps on high settings. I will re-test using the same criteria when the beta is installed and report back.
For those 'number crunchers' amongst us, download is 7740.3 MB (currently achieving 7.8MB/s download speed) with BT Infinity.