will preview to general require a wipe?

[Todd[_5_]]

Hi All,

I have noticed that previous Windows preview releases came
will a dated kill switch and they also would not allow you
to upgrade to the general release.

Does anyone know if the preview of 10

1) has a kill switch?

2) will it allow for an upgrade to the general release
or will it require a wipe and reinstall?

Many thanks,
-T