Just install the extensions into ePO 4.6.9.
It worked for me.
Yes I've had it work in that environment of late.
Don't suppose your going from patch 1 to patch 7 as I'm trying to work out if that jump requires a reboot for Windows servers
@ Falaendor: Per Patch 7 release notes...
We recommend that you reboot the client system after installing this release of the product.
This is especially true if you have recently upgraded the McAfee Agent to one that uses the Syscore drivers, such as 22.214.171.124, 126.96.36.1996, etc, as VSE and MA both use those them. It won't FORCE a reboot, but is highly recommended.
Thanks all for the feedback. I'll push ahead with installing the new extensions (fingers crossed).