[Dx4win] FT1000MPMkV

[PY2YP]

Something very weird had happened; I have the following setup:
DX4WIN 8.05
FT-1000MP Mark V Field
CPU Intel I7 920 @ 2.67GHz
Prolific USB-to-Serial Comm Port (COM1) adapter
Windows 7 64bit Home Premium

Until tomorrow everything worked as expected and I haven't noticed any 
problem at all. However, I've just found out that the DX4WIN is no 
longer reading frequency and mode from the radio when adding QSO in real 
time and not reading the radio frequency control (shift F12) as well. 
When clicking at a spot the QSO window receives everything OK from the 
DX spot window, however, after 1 or 2 seconds the MODE and BAND fields 
change to their default values (CW, 40m). I have tried everything that 
come to my mind: restored the CFG and INI files from the backup; 
restored FT1000MPMkV.rig file from the backup; re-installed the DX4W and 
started from the scratch; updated the Prolific USB-to-Serial Comm Port 
driver; changed the comm port values; tried with the 8.04 version, which 
also worked before with no results. Then, at final attempt, I changed 
the radio set from FT1000MPMkV to FT1000MP and there it is working fine 
again.

The question is: Can I stay using FT1000MP.rig with FT-1000MP Mark V 
Field without any risk? What are the differences between FT1000MPMkV.rig 
and FT1000MP.rig functionalities, I mean, keep using FT1000MP.rig I will 
loose any functionality?

Thanks in advance for any help.

-- 
73 DX de PY2YP - Cesar