6.40.5 is not a beta release. It's been released to the public since early June (about two months ago). Either way, I don't think using the older version is the problem. Could you post a screenshot so I can look at it and what the problem may be?
"You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip
My 2D game - release on Jun 13th; My tutorials
