OK, I've installed winmerge. I can see that apart the \KMotion\Data Directory also the "G code programs" and "C programs" directories are affected (as I modified/added my programs there).
And once I move my C and G files to the new location, BOTH Kmotion and Mach3 need to be reconfigured as the paths don't match anymore.

In order to prevent this every time I update the Kmotion version, I've moved G files and C programs elsewhere and made both Mach3 and Kmotion point to that external location so that the old configuration is still working after a version update. Is this approach correct?

However, KmotionCNC is now complaining about missing emc.var file, every time I launch it. I can see that emc.var is in those directories I moved away, but couldn't find how to tell Kmotion the path to the new location.
How do I fix it?

Regards,
EC

--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi EC,
>
> Please see:
>
> http://www.cnczone.com/forums/dynomotion_kflop_kanalog/174449-kflop_4_3_a.html
>
> Regards
> TK
>
>
>
>
> ________________________________
> From: ericncn <ericnc@...>
> To: DynoMotion@yahoogroups.com
> Sent: Sunday, February 24, 2013 12:12 PM
> Subject: [DynoMotion] Re: Test Version 4.30m
>
>
>  
>
>
> Hi,
>
> a new user here.
> What is the recommended procedure for upgrading to a newer version while preserving the configuration of the previous version?
>
> Thank you
> EC
>
> --- In DynoMotion@yahoogroups.com, "TKSOFT" wrote:
> >
> >
> > This Version fixes a bug introduced in previous Version V4.30l where the
> > KMotion Console Screen would lock up as soon as it became full. If you
> > are using that Version please upgrade immediately.
> >
> > http://dynomotion.com/Software/KMotion430m.exe
> > http://dynomotion.com/Software/KMotion430m.exe>
> >
> >
> > Regards
> > TK
> >
>