It could not be an earlier version, it should be a later version. AFAIK it was compiled in VFP6. You can contact the author Martin Jindra and see, if it would work in earlier versions...
>tried to run it and it says it was compiled for an earlier version of VFP than my 5.0 - its PDM.APP .....I'll try again after Christmas - thanks and happy holidays!
If it's not broken, fix it until it is.
My Blog