Reports are saved for as long as you have a PiinPoint account. To see a library of all the reports in your account, go to the Reports tab in the top left navigation bar. 

There are two tabs within the Report Library: Reports and Batch Reports:

On this page you can adjust the privacy of your reports to be available to only you or to all the PiinPoint accounts in your company. 

You can also view or create your batch reports from this page as well. Click Batch Reports and you will be directed to a new page with all of your old batch reports.