Sep 5, 2013 at 3:45 PM
Edited Sep 5, 2013 at 3:46 PM
You can enter advanced "date range" operators in the search term box in the Import from Twitter Search Network dialog box. For example, if you enter this into the search term box:
NodeXL since:2013-09-03 until:2013-09-04
...then you'll get the tweets between those two days. You can read about these and other operators by clicking the "Advanced search help" link in the dialog box.
However, Twitter severely limits how far back you can go. Here is what Twitter says about that:
"The Search API is not complete index of all Tweets, but instead an index of recent Tweets. At the moment that index includes between 6-9 days of Tweets."
(The "Search API" is what NodeXL uses to get tweets from Twitter.) The unfortunate result is that you will not be able to get the June-through-August tweets that you want. There is no way to do that in NodeXL.