I'm having the same problem. I installed Harpoon CE on Windows 10 Pro under c:\matrix games. Here's what got installed:
C:\Matrix Games\HCE>dir *.rsr
Volume in drive C is OS
Volume Serial Number is 96FF-FC6B
Directory of C:\Matrix Games\HCE
06/22/2008 07:31 AM 20,257,270 commondb.rsr
05/02/2009 02:49 PM 416,715 HDSD.RSR
05/02/2009 02:52 PM 490,585 HDSE.RSR
05/02/2009 02:52 PM 479,917 HDSF.RSR
05/02/2009 02:52 PM 239,027 HDSG.RSR
04/04/2009 02:18 PM 0 hdsl.rsr
06/13/2008 01:43 PM 0 hdsn.rsr
06/13/2008 01:43 PM 0 hdso.rsr
06/13/2008 01:43 PM 0 hdsp.rsr
06/13/2008 01:43 PM 0 hdsq.rsr
02/13/2008 07:52 PM 0 hdsu.rsr
05/07/2010 09:00 PM 1,032,486 usni.rsr