If I remember correctly, the Home point is in the Flight Info section
FAI>EDIT>INFO>HOM
You should then be able to either edit the HOM point coordinates or select
from a list of waypoints in the device.
You could also change this info on your PC (it will be in the same area as
the Pilot Name, Glider type, Class etc) and upload the flight info to the
Volkslogger.
This link will get you the manual:
www.uppsalafk.com/segel/dokumentation/gps/Volkslogger_vl174e.pdf
Page 17 talks about the home point as part of INFO.
By the way the VL is great as a back-up logger. I have extracted a
successful trace even with the glider battery volts below 7V and everything
else shut-down due to lack of volts. Just remember to clear the memory
frequently as once it is full, the VL will stop recording.
Good luck,
Regards,
Roy