I have not played around with contruct for the last betas but when I updated to R70 today I ran into huge problems: Construct crashed everytime I tried to create a new project. So I uninstalled Contruct, made sure the registry folder was gone and reinstalled R70. There's a different behaviour now but the crashes seem to be related to creating/loading/opening/saving projects and/or layouts.
I have made one change since I used Construct 2 last time and that was installing the NVIDIA System Monitor tools. And sure enough, if I close NVIDIA System Monitor Construct seems to be working normal. Running MVIDIA System Monitor causes Construct to become completely unstable and crash to desktop without any error but the normal windows "aplpication stopped working" exception error.
Some kind of conflict related to using hardware accelerated graphics?
I'm running Windows 7 64 Bit.
My Nvidia drivers are 285.62 and I'm running a GTX 460.