Enable Kext Signing

I used to use Trim Enabler, which uses kext disabling to allow for 3rd party ssd. I updated 10.10.5 and no longer need disabled kext signing. I did not update Trim Enabler, and by default, went in, disabled kext, and rebooted.

Well, now I can used the new trimforce command to enable trim, but kext is still disabled. My boot.plist still shows "kext-dev-mode=1."

How do I re-enable kext signing? Thanks for your help!!

--Kenny