If you deactivate a survey, you will lose all current responses. If you want to just disable the survey, you should make it expire which will allow you to reactivate it and still keep your previous responses.
And to disable a survey (and loose all history), look at little red square.
Denis
Assistance on LimeSurvey forum and LimeSurvey core development are on my free time.
I'm not a LimeSurvey GmbH member,
professional service on demand
,
plugin development
. I don't answer to private message.