There are two approaches to reactivate archived survey
Under the Surveys menu, in the Archived tab
Click on the ellipsis (...) next to the archived survey you wish to reactivate.
Then, click Activate Survey
Then, click Activate Survey to confirm
Under the Surveys menu, in the Archived tab, pick an archived survey name you wish to reactivate.
An archived survey is identified with a label (Archived) next to its name
Click Active Survey, a green button on the left bottom corner of your screen
Then, click Active Survey to confirm
Now your survey has been activated and active.