What is voltbase and timebase?
Delete row 3.
Left click on cell A1 and hold.
Drag through B:xxx where XXX is the end row of the data.
Click the CHART button.

The X dimension (time) is 2,000,000,000ps each, or 2ms.
The Y dimension (voltage) is 10,000,000µV or 10v.
Change the labels of the chart to reflect this, or do some math on these values and create another chart.