Can I "re-enable" something?
I have disabled something and want to enable it again. Can I say that I "re-enable it" or do I simply "enable" it?
If it was enabled at some point in the past, then you can re-enable it.
Technically if it was never enabled before and you turn it on for the first time, you shouldn't call that "re-enabling", but I doubt anybody would really care to split that hair if it's something that's likely to be flipped back and forth on any sort of frequent basis.