A new release of Envy is available. Here’s the changelog:
* Added: Nvidia driver 169.07
* Removed: Nvidia driver 100.14.23
* Added: AMD Catalyst driver 7.12
* Removed: AMD Catalyst driver 7.11
ATI’s Catalyst driver 7.12 uses DKMS (thanks to Mario Limonciello), and I’m planning to add DKMS to the NVIDIA driver in Envy’s next release (0.9.10) (as well as other cool features). Thanks to DKMS you won’t have to reinstall the driver every time the kernel is updated.
Make sure you read the Release Notes and (especially) the Known issues of both the ATI and the NVIDIA driver before you install any of these drivers.
You can get the driver here.
Merry Christmas and a Happy New Year or, if you’re not a Christian, I simply wish you a good time 
EDIT: if you need Envy’s previous release you can get it here:
Envy New
Envy Legacy