The final piece of the jig saw was this batch file
forfiles /s /p "C:\Users\Peter\Lilypool\Music_Files\Bouffil" /M **.ly /c "cmd /c convert-ly.py -e @file" Getting this to work was non trivial. I will try and get a batch file to ask for the folder "Bouffil" etc to make updating easy. Shame that Fresco is still deficient. Thanks everyone - no one advice solved the whole thing. Path. and assoc. were needed Regards Peter