I think you're looking for Menu > History > Show Past Flight Trail. You will see a list of recorded flights and their durations. (You can do this on your phone, without transferring the logs to Windows.)
As an aside, another possible option for determining the duration of a flight is to check flightaware.com for the tail number of the plane you were in. If your plane was not using ADSB-out and you weren't using Flight Following (or on an IFR plan), then there won't be any way to retrieve the data (since there won't be any way to link any position data they got with your tail number). However, if you did have ADSB-out or used FF, then FA probably has a record.