Yeah you need to have 4.5 to use the recording feature. all that are out are betas... from my own experience 4.5.0.44 and 4.5.0.46 are pretty stable and are pretty good to install but don't take my word for it cause it seems to be different for everyone.
the official should be out soontime though. hopefully sooner rather than later. good luck!
^^^as he said, it's different for everyone... I might have a problem with a OS that you don't and vice versa... your best bet is to upgrade to the highest possible OS that is an Offical release.... check the sticky's