Timestamp question - can not sync video/.fit

Hi !

I recorded a video using a GoPro.
Although the FILE timestamp shows correctly 7:17AM
the Virb software is showing 3:17 AM... exactly 4 hours behind...

How can I correct this ?

ps: when I import the gmetrix (.fit) and try to adjust the Activity Start Time, it shows a black video screen and the message "4:00:00 after end of Clip" ...

Can someone help me ?

Thanks