Brian,
Assuming you have a USB to serial port, or a native serial port on your PC.
In the software, set the COM port details as below :
Bits/s - 19200
Data Bits - 8
Parity - None
Stop Bits - 1
Flow Control - Hardware
After you have fired your string of shots over the chrono, save the shots to memory on the chrono.
(S2 --> S2 --> Shows the Eavg on screen, --> S1, then select S2 to write)
Where S1 = left most button on the chrono, S2 is the middle button)
Attach the chrono to the PC, set serial port details, and click connect.
On the chrono, read the data from the memory - ((S2 --> S2 --> Shows the Eavg on screen, --> S1, then select S1 to read)
This should load the data into the software.
Have fun
Best regards
Russ