IIRC Kindwords is somehow relted to Wordworth/AmiWrite. (I think AmiWrite is the German version of Kindords and Wordworth is the successor of both).
If this is true, the docs are stored in a binary format which no PC tool can read. So you have to fire up Kindwords again, either on your Amiga or with an Amiga emulator, and export the docs as text or RTF.
Bye,
Thomas