Hello isurfsafe,
Yes, it is possible to use the SSP project. When you load the SSP file you should see previously saved intervals on the timeline. Blue-colored markers are currently active markers, white markers are currently not active. To change the times, please select the necessary interval with the yellow slider. Now you should have 2 blue-colored markers - START and END. Under the timeline there are 2 edit boxes the first of them shows the time of the START marker and the second shows the END marker time accordingly. Now, you can change the time of the intervals moving markers with the mouse cursor or typing necessary time values into the edit boxes.