[Xymon] disabling all alerts from xymon

I was wondering if the method for disabling all alerts from Xymon has changed. The method we are using is as follows:

In tasks.cfg, we add a DISABLE tag to the "Alert" module, like so:

[alert] DISABLE ENVFILE /path.....

However, last night members of our team did overnight maintenance and reported that this did not work as expected. We used this method many times in the past, but I don't think we've tested it on Xymon 4.3.3. Should this still work? Do we need to restart xymon? Is there another config that needs to change?

Any tips are appreciated.

Tom