"we don't exclude a CQRLOG clone dedicated to the contesters"
I have been involved in N1MM, and realize how hard this would be.
Having said that, N1MM is not going to port (VB6).
It really is time- I suspect you have learned much thru CQRlog ?
Start very minimal-- but make a start.
There are a lot of contesters that are STUCK with windoze because we need the logger support.